Epistemology, is, so we are told, a theory of knowledge: Of course, its aim is to discern and explain that quality or quantity enough of which distinguishes knowledge from mere true belief. We need a name for this quality or quantity, whatever precisely it is, call it ‘warrant’. From this point of view, the epistemology of religious belief should centre on the question whether religious belief has warrant, an if it does, hoe much it has and how it gets it. As a matter of fact, however, epistemological discussion of religious belief, at least since the Enlightenment (and in the Western world, especially the English-speaking Western world) has tended to focus, not on the question whether religious belief has warrant, but whether it is justified. More precisely, it has tended to focus on the question whether those properties manifested by theistic belief -the belief that there exists a person like the God of traditional Christianity, Judaism and Islam: An almighty Law Maker, or an all-knowing and most wholly benevolent and a loving spiritual person who has created the living world. The chief question, therefore, has ben whether theistic belief is justified, the same question is often put by asking whether theistic belief is rational or rationally acceptable. Still further, the typical way of addressing this question has been by way of discussing arguments for or and against the existence of God. On the pro side, there are the traditional theistic proofs or arguments: The ontological, cosmological and teleological arguments, using Kant’s terms for them. On the other side, the anti-theistic side, the principal argument is the argument from evil, the argument that is not possible or at least probable that there be such a person as God, given all the pain, suffering and evil the world displays. This argument is flanked by subsidiary arguments, such as the claim that the very concept of God is incoherent, because, for example, it is impossible that there are the people without a body, and Freudian and Marxist claims that religious belief arises out of a sort of magnification and projection into the heavens of human attributes we think important.
But why has discussion centred on justification rather than warrant? And precisely what is justification? And why has the discussion of justification of theistic belief focussed so heavily on arguments for and against the existence of God?
As to the first question, we can see why once we see that the dominant epistemological tradition in modern Western philosophy has tended to ‘identify’ warrant with justification. On this way of looking at the matter, warrant, that which distinguishes knowledge from mere true belief, just ‘is’ justification. Belief theory of knowledge-the theory according to which knowledge is justified true belief has enjoyed the status of orthodoxy. According to this view, knowledge is justified truer belief, therefore any of your beliefs have warrant for you if and only if you are justified in holding it.
But what is justification? What is it to be justified in holding a belief? To get a proper sense of the answer, we must turn to those twin towers of western epistemology. René Descartes and especially, John Locke. The first thing to see is that according to Descartes and Locke, there are epistemic or intellectual duties, or obligations, or requirements. Thus, Locke:
Faith is nothing but a firm assent of the mind, which if it is regulated, A is our duty, cannot be afforded to anything, but upon good reason: And cannot be opposite to it, he that believes, without having any reason for believing, may be in love with his own fanciers: But, neither seeks truth as he ought, nor pats the obedience due his maker, which would have him use those discerning faculties he has given him: To keep him out of mistake and error. He that does this to the best of his power, however, he sometimes lights on truth, is in the right but by chance: And I know not whether the luckiest of the accidents will excuse the irregularity of his proceeding. This, at least is certain, that he must be accountable for whatever mistakes he runs into: Whereas, he that makes use of the light and faculties God has given him, by seeks sincerely to discover truth, by those helps and abilities he has, may have this satisfaction in doing his duty as rational creature, that though he should miss truth, he will not miss the reward of it. For he governs his assent right, and places it as he should, who in any case or matter whatsoever, believes or disbelieves, according as reason directs him. He that does otherwise, transgresses against his own light, and misuses those faculties, which were given him . . . (Essays 4.17.24).
Rational creatures, creatures with reason, creatures capable of believing propositions (and of disbelieving and being agnostic with respect to them), say Locke, have duties and obligation with respect to the regulation of their belief or assent. Now the central core of the notion of justification(as the etymology of the term indicates) this: One is justified in doing something or in believing a certain way, if in doing one is innocent of wrong doing and hence not properly subject to blame or censure. You are justified, therefore, if you have violated no duties or obligations, if you have conformed to the relevant requirements, if you are within your rights. To be justified in believing something, then, is to be within your rights in so believing, to be flouting no duty, to be to satisfy your epistemic duties and obligations. This way of thinking of justification has been the dominant way of thinking about justification: And this way of thinking has many important contemporary representatives. Roderick Chisholm, for example (as distinguished an epistemologist as the twentieth century can boast), in his earlier work explicitly explains justification in terms of epistemic duty (Chisholm, 1977).
The (or, a) main epistemological; questions about religious believe, therefore, has been the question whether or not religious belief in general and theistic belief in particular is justified. And the traditional way to answer that question has been to inquire into the arguments for and against theism. Why this emphasis upon these arguments? An argument is a way of marshalling your propositional evidence-the evidence from other such propositions as likens to believe-for or against a given proposition. And the reason for the emphasis upon argument is the assumption that theistic belief is justified if and only if there is sufficient propositional evidence for it. If there is not’ much by way of propositional evidence for theism, then you are not justified in accepting it. Moreover, if you accept theistic belief without having propositional evidence for it, then you are ging contrary to epistemic duty and are therefore unjustified in accepting it. Thus, W.K. William James, trumpets that ‘it is wrong, always everything upon insufficient evidence’, his is only the most strident in a vast chorus of only insisting that there is an intellectual duty not to believe in God unless you have propositional evidence for that belief. (A few others in the choir: Sigmund Freud, Brand Blanshard, H.H. Price, Bertrand Russell and Michael Scriven.)
Now how it is that the justification of theistic belief gets identified with there being propositional evidence for it? Justification is a matter of being blameless, of having done one’s duty (in this context, one’s epistemic duty): What, precisely, has this to do with having propositional evidence?
The answer, once, again, is to be found in Descartes especially Locke. As, justification is the property your beliefs have when, in forming and holding them, you conform to your epistemic duties and obligations. But according to Locke, a central epistemic duty is this: To believe a proposition only to the degree that it is probable with respect to what is certain for you. What propositions are certain for you? First, according to Descartes and Locke, propositions about your own immediate experience, that you have a mild headache, or that it seems to you that you see something red: And second, propositions that are self-evident for you, necessarily true propositions so obvious that you cannot so much as entertain them without seeing that they must be true. (Examples would be simple arithmetical and logical propositions, together with such propositions as that the whole is at least as large as the parts, that red is a colour, and that whatever exists has properties.) Propositions of these two sorts are certain for you, as fort other prepositions. You are justified in believing if and only if when one and only to the degree to which it is probable with respect to what is certain for you. According to Locke, therefore, and according to the whole modern foundationalist tradition initiated by Locke and Descartes (a tradition that until has recently dominated Western thinking about these topics) there is a duty not to accept a proposition unless it is certain or probable with respect to what is certain.
In the present context, therefore, the central Lockean assumption is that there is an epistemic duty not to accept theistic belief unless it is probable with respect to what is certain for you: As a consequence, theistic belief is justified only if the existence of God is probable with respect to what is certain. Locke does not argue for his proposition, he simply announces it, and epistemological discussion of theistic belief has for the most part followed hin ion making this assumption. This enables ‘us’ to see why epistemological discussion of theistic belief has tended to focus on the arguments for and against theism: On the view in question, theistic belief is justified only if it is probable with respect to what is certain, and the way to show that it is probable with respect to what it is certain are to give arguments for it from premises that are certain or, are sufficiently probable with respect to what is certain.
There are at least three important problems with this approach to the epistemology of theistic belief. First, there standards for theistic arguments have traditionally been set absurdly high (and perhaps, part of the responsibility for this must be laid as the door of some who have offered these arguments and claimed that they constitute wholly demonstrative proofs). The idea seems to test. a good theistic argument must start from what is self-evident and proceed majestically by way of self-evidently valid argument forms to its conclusion. It is no wonder that few if any theistic arguments meet that lofty standard -particularly, in view of the fact that almost no philosophical arguments of any sort meet it. (Think of your favourite philosophical argument: Does it really start from premisses that are self-evident and move by ways of self-evident argument forms to its conclusion?)
Secondly, attention has ben mostly confined to three theistic arguments: The traditional arguments, cosmological and teleological arguments, but in fact, there are many more good arguments: Arguments from the nature of proper function, and from the nature of propositions, numbers and sets. These are arguments from intentionality, from counterfactual, from the confluence of epistemic reliability with epistemic justification, from reference, simplicity, intuition and love. There are arguments from colours and flavours, from miracles, play and enjoyment, morality, from beauty and from the meaning of life. This is even a theistic argument from the existence of evil.
But there are a third and deeper problems here. The basic assumption is that theistic belief is justified only if it is or can be shown as the probable respect to many a body of evidence or proposition -perhaps, those that are self-evident or about one’s own mental life, but is this assumption true? The idea is that theistic belief is very much like a scientific hypothesis: It is acceptable if and only if there is an appropriate balance of propositional evidence in favour of it. But why believe a thing like that? Perhaps the theory of relativity or the theory of evolution is like that, such a theory has been devised to explain the phenomena and gets all its warrant from its success in so doing. However, other beliefs, e.g., memory beliefs, felt in other minds is not like that, they are not hypothetical at all, and are not accepted because of their explanatory powers. There are instead, the propositions from which one start in attempting to give evidence for a hypothesis. Now, why assume that theistic belief, belief in God, is in this regard more like a scientific hypothesis than like, say, a memory belief? Why think that the justification of theistic belief depends upon the evidential relation of theistic belief to other things one believes? According to Locke and the beginnings of this tradition, it is because there is a duty not to assent to a proposition unless it is probable with respect to what is certain to you, but is there really any such duty? No one has succeeded in showing that, say, belief in other minds or the belief that there has been a past, is probable with respect to what is certain for ‘us’. Suppose it is not: Does it follow that you are living in epistemic sin if you believe that there are other minds? Or a past?
There are urgent questions about any view according to which one has duties of the sort ‘do not believe ‘p’ unless it is probable with respect to what is certain for you; . First, if this is a duty, is it one to which I can conform? My beliefs are for the most part not within my control: Certainly they are not within my direct control. I believe that there has been a past and that there are other people, even if these beliefs are not probable with respect to what is certain forms (and even if I came to know this) I could not give them up. Whether or not I accept such beliefs are not really up to me at all, For I can no more refrain from believing these things than I can refrain from conforming yo the law of gravity. Second, is there really any reason for thinking I have such a duty? Nearly everyone recognizes such duties as that of not engaging in gratuitous cruelty, taking care of one’s children and one’s aged parents, and the like, but do we also find ourselves recognizing that there is a duty not to believe what is not probable (or, what we cannot see to be probable) with respect to what are certain for ‘us’? It hardly seems so. However, it is hard to see why being justified in believing in God requires that the existence of God be probable with respect to some such body of evidence as the set of propositions certain for you. Perhaps, theistic belief is properly basic, i.e., such that one is perfectly justified in accepting it on the evidential basis of other propositions one believes.
Taking justification in that original etymological fashion, therefore, there is every reason ton doubt that one is justified in holding theistic belief only inf one is justified in holding theistic belief only if one has evidence for it. Of course, the term ‘justification’ has under-gone various analogical extensions in the of various philosophers, it has been used to name various properties that are different from justification etymologically so-called, but anagogically related to it. In such a way, the term sometimes used to mean propositional evidence: To say that a belief is justified for someone is to saying that he has propositional evidence (or sufficient propositional evidence) for it. So taken, however, the question whether theistic belief is justified loses some of its interest; for it is not clear (given this use) beliefs that are unjustified in that sense. Perhaps, one also does not have propositional evidence for one’s memory beliefs, if so, that would not be a mark against them and would not suggest that there be something wrong holding them.
Another analogically connected way to think about justification (a way to think about justification by the later Chisholm) is to think of it as simply a relation of fitting between a given proposition and one’s epistemic vase -which includes the other things one believes, as well as one’s experience. Perhaps tat is the way justification is to be thought of, but then, if it is no longer at all obvious that theistic belief has this property of justification if it seems as a probability with respect to many another body of evidence. Perhaps, again, it is like memory beliefs in this regard.
To recapitulate: The dominant Western tradition has been inclined to identify warrant with justification, it has been inclined to take the latter in terms of duty and the fulfilment of obligation, and hence to suppose that there is no epistemic duty not to believe in God unless you have good propositional evidence for the existence of God. Epistemological discussion of theistic belief, as a consequence, as concentrated on the propositional evidence for and against theistic belief, i.e., on arguments for and against theistic belief. But there is excellent reason to doubt that there are epistemic duties of the sort the tradition appeals to here.
And perhaps it was a mistake to identify warrant with justification in the first place. Napoleons have little warrant for him: His problem, however, need not be dereliction of epistemic duty. He is in difficulty, but it is not or necessarily that of failing to fulfill epistemic duty. He may be doing his epistemic best, but he may be doing his epistemic duty in excelsis: But his madness prevents his beliefs from having much by way of warrant. His lack of warrant is not a matter of being unjustified, i.e., failing to fulfill epistemic duty. So warrant and being epistemologically justified by name are not the same things. Another example, suppose (to use the favourite twentieth-century variant of Descartes’ evil demon example) I have been captured by Alpha-Centaurian super-scientists, running a cognitive experiment, they remove my brain, and keep it alive in some artificial nutrients, and by virtue of their advanced technology induce in me the beliefs I might otherwise have if I were going about my usual business. Then my beliefs would not have much by way of warrant, but would it be because I was failing to do my epistemic duty? Hardly.
As a result of these and other problems, another, externalist way of thinking about knowledge has appeared in recent epistemology, that a theory of justification is internalized if and only if it requires that all of its factors needed for a belief to be epistemically accessible to that of a person, internal to his cognitive perception, and externalist, if it allows that, at least some of the justifying factors need not be thus accessible, in that they can be external to the believer’ s cognitive Perspectives, beyond his ken. However, epistemologists often use the distinction between internalized and externalist theories of epistemic justification without offering any very explicit explanation.
Or perhaps the thing to say, is that it has reappeared, for the dominant sprains in epistemology priori to the Enlightenment were really externalist. According to this externalist way of thinking, warrant does not depend upon satisfaction of duty, or upon anything else to which the Knower has special cognitive access (as he does to what is about his own experience and to whether he is trying his best to do his epistemic duty): It depends instead upon factors ‘external’ to the epistemic agent -such factors as whether his beliefs are produced by reliable cognitive mechanisms, or whether they are produced by epistemic faculties functioning properly in-an appropriate epistemic environment.
How will we think about the epistemology of theistic belief in more than is less of an externalist way (which is at once both satisfyingly traditional and agreeably up to date)? I think, that the ontological question whether there is such a person as God is in a way priori to the epistemological question about the warrant of theistic belief. It is natural to think that if in fact we have been created by God, then the cognitive processes that issue in belief in God are indeed realisable belief-producing processes, and if in fact God created ‘us’, then no doubt the cognitive faculties that produce belief in God is functioning properly in an epistemologically congenial environment. On the other hand, if there is no such person as God, if theistic belief is an illusion of some sort, then things are much less clear. Then beliefs in God in of the most of basic ways of wishing that never doubt the production by which unrealistic thinking or another cognitive process not aimed at truth. Thus, it will have little or no warrant. And belief in God on the basis of argument would be like belief in false philosophical theories on the basis of argument: Do such beliefs have warrant? Notwithstanding, the custom of discussing the epistemological questions about theistic belief as if they could be profitably discussed independently of the ontological issue as to whether or not theism is true, is misguided. There two issues are intimately intertwined,
Nonetheless, the vacancy left, as today and as days before are an awakening and untold story beginning by some sparking conscious paradigm left by science. That is a central idea by virtue accredited by its epistemology, where in fact, is that justification and knowledge arising from the proper functioning of our intellectual virtues or faculties in an appropriate environment. This particular yet, peculiar idea is captured in the following criterion for justified belief:
(J) ‘S’ is justified in believing that ‘p’ if and only if of S’s believing that ‘p’ is the result of S’s intellectual virtues or faculties functioning in appropriate environment.
What is an intellectual virtue or faculty? A virtue or faculty in general is a power or ability or competence to achieve some result. An intellectual virtue or faculty, in the sense intended above, is a power or ability or competence to arrive at truths in a particular field, and to avoid believing falsehoods in that field. Examples of human intellectual virtues are sight, hearing, introspection, memory, deduction and induction. More exactly.
(V) A mechanism ‘M’ for generating and/or maintaining beliefs is an intellectual virtue if and only if ‘M’‘s’ is a competence to believing true propositions and refrain from false believing propositions within a field of propositions ‘F’, when one is in a set of circumstances ‘C’.
It is required that we specify a particular field of suggestions or its propositional field for ‘M’, since a given cognitive mechanism will be a competence for believing some kind of truths but not others. The faculty of sight, for example, allows ‘us’ to determine the colour of objects, but not the sounds that they associatively make. It is also required that we specify a set of circumstances for ‘M’, since a given cognitive mechanism will be a competence in some circumstances but not others. For example, the faculty of sight allows ‘us’ to determine colours in a well lighten room, but not in a darkened cave or formidable abyss.
According to the aforementioned formulations, what makes a cognitive mechanism an intellectual virtue is that it is reliable in generating true beliefs than false beliefs in the relevant field and in the relevant circumstances. It is correct to say, therefore, that virtue epistemology is a kind of reliabilism. Whereas, genetic reliabilism maintains that justified belief is belief that results from a reliable cognitive process, virtue epistemology makes a restriction on the kind of process which is allowed. Namely, the cognitive processes that are important for justification and knowledge is those that have their basis in an intellectual virtue.
Finally, that the concerning mental faculty reliability point to the importance of an appropriate environment. The idea is that cognitive mechanisms might be reliable in some environments but not in others. Consider an example from Alvin Plantinga. On a planet revolving around Alfa Centauri, cats are invisible to human beings. Moreover, Alfa Centaurian cats emit a type of radiation that causes humans to form the belief that there I a dog barking nearby. Suppose now that you are transported to this Alfa Centaurian planet, a cat walks by, and you form the belief that there is a dog barking nearby. Surely you are not justified in believing this. However, the problem here is not with your intellectual faculties, but with your environment. Although your faculties of perception are reliable on earth, yet are unrealisable on the Alga Centaurian planet, which is an inappropriate environment for those faculties.
The central idea of virtue epistemology, as expressed in (J) above, has a high degree of initial plausibility. By masking the idea of faculties’ cental to the reliability if not by the virtue of epistemology, in that it explains quite neatly to why beliefs are caused by perception and memories are often justified, while beliefs caused by unrealistic and superstition are not. Secondly, the theory gives ‘us’ a basis for answering certain kinds of scepticism. Specifically, we may agree that if we were brains in a vat, or victims of a Cartesian demon, then we would not have knowledge even in those rare cases where our beliefs turned out true. But virtue epistemology explains that what is important for knowledge is toast our faculties are in fact reliable in the environment in which we are. And so we do have knowledge so long as we are in fact, not victims of a Cartesian demon, or brains in a vat. Finally, Plantinga argues that virtue epistemology deals well with Gettier problems. The idea is that Gettier problems give ‘us’ cases of justified belief that is ‘truer by accident’. Virtue epistemology, Plantinga argues, helps ‘us’ to understand what it means for a belief to be true by accident, and provides a basis for saying why such cases are not knowledge. Beliefs are rue by accident when they are caused by otherwise reliable faculties functioning in an inappropriate environment. Plantinga develops this line of reasoning in Plantinga (1988).
But although virtue epistemology has god initial plausibility, it faces some substantial objections. The first of an objection, which virtue epistemology face is a version of the generality problem. We may understand the problem more clearly if we were to consider the following criterion for justified belief, which results from our explanation of (J).
(J ʹ) ‘S’ is justified in believing that ‘p’ if and entirely if.
(A) there is a field ‘F’ and a set of circumstances ‘C’ such that
(1) ‘S’ is in ‘C’ with respect to the proposition that ‘p’,
(2) ‘S’ is in ‘C’ with respect to the proposition that ‘p’,
(3) If ‘S’ were in ‘C’ with respect to a proposition in ‘F’.
Then ‘S’ would very likely believe correctly with regard
to that proposition.
The problem arises in how we are to select an appropriate ‘F’ and ‘C’. For given any true belief that ‘p’, we can always come up with a field ‘F’ and a set of circumstances ‘C’, such that ‘S’ is perfectly reliable in ‘F’ and ‘C’. For any true belief that ‘p’, let ‘F’s’ be the field including only the propositions ‘p’ and ‘not-p’. Let ‘C’ include whatever circumstances there are which causes ‘p’s’ to be true, together with the circumstanced which causes ‘S’ to believe that ‘p’. Clearly, ‘S’ is perfectly reliable with respect to propositions in this field in these circumstances. But we do not want to say that all of S’s true beliefs are justified for ‘S’. And of course, there is an analogous problem in the other direction of generality. For given any belief that ‘p’, we can always specify a field of propositions ‘F’ and a set of circumstances ‘C’, such that ‘p’ is in ‘F’, ‘S’ is in ‘C’, and ‘S’ is not reliable with respect to propositions in ‘F’ in ‘C’.
Variations of this view have been advanced for both knowledge and justified belief. The first formulation of a reliability account of knowing appeared in a note by F.P. Ramsey (1931), who said that a belief was knowledge if it is true, certain and obtained by a reliable process. P. Unger (1968) suggested that ‘S’ knows that ‘p’ just in case it is not at all accidental that ‘S’ is right about its being the case that ‘p’. D.M. Armstrong (1973) drew an analogy between a thermometer that reliably indicates the temperature and a belief that reliably indicate the truth. Armstrong said that a non-inferential belief qualified as knowledge if the belief has properties that are nominally sufficient for its truth, i.e., guarantee its truth via laws of nature.
Closely allied to the nomic sufficiency account of knowledge, primarily due to F.I. Dretske (1981), A.I. Goldman (1976, 1986) and R. Nozick (1981). The core of tis approach is that S’s belief that ‘p’ qualifies as knowledge just in case ‘S’ believes ‘p’ because of reasons that would not obtain unless ‘p’s’ being true, or because of a process or method that would not yield belief in ‘p’ if ‘p’ were not true. For example, ‘S’ would not have his current reasons for believing there is a telephone before him, or would not come to believe this, unless there was a telephone before him. Thus, there is a counterfactual reliable guarantor of the belief’s being true. A variant of the counterfactual approach says that ‘S’ knows that ‘p’ only if there is no ‘relevant alterative’ situation in which ‘p’ is false but ‘S’ would still believe that ‘p’.
To a better understanding, this interpretation is to mean that the alterative attempt to accommodate any of an opposing strand in our thinking about knowledge one interpretation is an absolute concept, which is to mean that the justification or evidence one must have in order to know a proposition ‘p’ must be sufficient to eliminate all the alternatives to ‘p’ (where an alternative to a proposition ‘p’ is a proposition incompatible with ‘p’). That is, one’s justification or evidence for ‘p’ must be sufficient fort one to know that every alternative to ‘p’ is false. These elements of our thinking about knowledge are exploited by sceptical argument. These arguments call our attention to alternatives that our evidence cannot eliminate. For example, (Dretske, 1970), when we are at the zoo. We might claim to know that we see a zebra on the basis of certain visual evidence, namely a zebra-like appearance. The sceptic inquires how we know that we are not seeing a clearly disguised mule. While we do have some evidence against the likelihood of such a deception, intuitively it is not strong enough for ‘us’ to know that we are not so deceived. By pointing out alternatives of this nature that cannot eliminate, as well as others with more general application (dreams, hallucinations, etc.), the sceptic appears to show that this requirement that our evidence eliminate every alternative is seldom, if ever, met.
The above considerations show that virtue epistemology must say more about the selection of relevant fields and sets of circumstances. Established addresses the generality problem by introducing the concept of a design plan for our intellectual faculties. Relevant specifications for fields and sets of circumstances are determined by this plan. One might object that this approach requires the problematic assumption of a Designer of the design plan. But Plantinga disagrees on two counts: He does not think that the assumption is needed, or that it would be problematic. Plantinga discusses relevant material in Plantinga (1986, 1987 and 1988). Ernest Sosa addresses the generality problem by introducing the concept of an epistemic perspective. In order to have reflective knowledge, ‘S’ must have a true grasp of the reliability of her faculties, this grasp being itself provided by a ‘faculty of faculties’. Relevant specifications of an ‘F’ and ‘C’ are determined by this perspective. Alternatively, Sosa has suggested that relevant specifications are determined by the purposes of the epistemic community. The idea is that fields and sets of circumstances are determined by their place in useful generalizations about epistemic agents and their abilities to act as reliable-information sharers.
The second objection which virtue epistemology faces are that (J) and
(Jʹ) are too strong. It is possible for ‘S’ to be justified in believing that ‘p’, even when ‘S’s’ intellectual faculties are largely unreliable. Suppose, for example, that Jane’s beliefs about the world around her are true. It is clear that in this case Jane’s faculties of perception are almost wholly unreliable. But we would not want to say that none of Jane’s perceptual beliefs are justified. If Jane believes that there is a tree in her yard, and she vases the belief on the usual tree-like experience, then it seems that she is as justified as we would be regarded a substitutable belief.
Sosa addresses the current problem by arguing that justification is relative to an environment ‘E’. Accordingly, ‘S’ is justified in believing that ‘p’ relative to ‘E’, if and only if ‘S’s’ faculties would be reliable in ‘E’. Note that on this account, ‘S’ need not actually be in ‘E’ in order for ‘S’ to be justified in believing some proposition relative to ‘E’. This allows Soda to conclude that Jane has justified belief in the above case. For Jane is justified in her perceptual beliefs relative to our environment, although she is not justified in those beliefs relative to the environment in which they have actualized her.
We have earlier made mention about analyticity, but the true story of analyticity is surprising in many ways. Contrary to received opinion, it was the empiricist Locke rather than the rationalist Kant who had the better information account of this type or deductive proposition. Frége and Rudolf Carnap (1891-1970) A German logician positivist whose first major works was “Der logische Aufbau der Welt” (1926, trs, as “The Logical Structure of the World,” 1967). Carnap pursued the enterprise of clarifying the structures of mathematics and scientific language (the only legitimate task for scientific philosophy) in “The Logical Syntax of Language,” (1937). Yet, refinements continued with “Meaning and Necessity” (1947), while a general losing of the original ideal of reduction culminated in the great “Logical Foundations of Probability” and the most importantly single work of ‘confirmation theory’ in 1950. Other works concern the structure of physics and the concept of entropy.
Both, Frége and Carnap, represented as analyticity’s best friends in this century, did as much to undermine it as its worst enemies. Quine (1908-) whose early work was on mathematical logic, and issued in “A System of Logistic” (1934), “Mathematical Logic” (1940) and “Methods of Logic” (1950) it was with this collection of papers a “Logical Point of View” (1953) that his philosophical importance became widely recognized, also, Putman (1926-) his concern in the later period has largely been to deny any serious asymmetry between truth and knowledge as it is obtained in natural science, and as it is obtained in morals and even theology. Books include, Philosophy of logic (1971), Representation and Reality (1988) and Renewing Philosophy (1992). Collections of his papers including Mathematics, Master, and Method, (1975), Mind, Language, and Reality, (1975) and Realism and Reason (1983). Both of which represented as having refuted the analytic/synthetic distinction, not only did no such thing, but, in fact, contributed significantly to undoing the damage done by Frége and Carnap. Finally, the epistemological significance of the distinctions is nothing like what it is commonly taken to be.
Locke’s account of an analyticity proposition as, for its time, everything that a succinct account of analyticity should be (Locke, 1924, pp. 306-8) he distinguished two kinds of analytic propositions, identified propositions in which we affirm the said terms if itself, e.g., ‘Roses are roses’, and predicative propositions in which ‘a part of the complex idea is predicated of the name of the whole’, e.g., ‘Roses are flowers’. Locke calls such sentences ‘trifling’ because a speaker who uses them ‘trifles with words’. A synthetic sentence, in contrast, such as a mathematical theorem, states ‘a truth and conveys with its informative real knowledge’. Correspondingly, Locke distinguishes two kinds of ‘ necessary consequences’, analytic entailment where validity depends on the literal containment of the conclusions in the premiss and synthetic entailments where it does not. (Locke did not originate this concept-containment notion of analyticity. It is discussions by Arnaud and Nicole, and it is safe to say it has been around for a very long time (Arnaud, 1964).
Kant’s account of analyticity, which received opinion tells ‘us’ is the consummate formulation of this notion in modern philosophy, is actually a step backward. What is valid in his account is not novel, and what is novel is not valid. Kant presents Locke’s account of concept-containment analyticity, but introduces certain alien features, the most important being his characterizations of most important being his characterization of analytic propositions as propositions whose denials are logical contradictions (Kant, 1783). This characterization suggests that analytic propositions based on Locke’s part-whole relation or Kant’s explicative copula are a species of logical truth. But the containment of the predicate concept in the subject concept in sentences like ‘Bachelors are unmarried’ is a different relation from containment of the consequent in the antecedent in a sentence like ‘If John is a bachelor, then John is a bachelor or Mary read Kant’s Critique’. The former is literal containment whereas, the latter are, in general, not. Talk of the ‘containment’ of the consequent of a logical truth in the metaphorical, a way of saying ‘logically derivable’.
Kant’s conflation of concept containment with logical containment caused him to overlook the issue of whether logical truths are synthetically deductive and the problem of how he can say mathematical truths are synthetically deductive when they cannot be denied without contradiction. Historically. , the conflation set the stage for the disappearance of the Lockean notion. Frége, whom received opinion portrays as second only to Kant among the champions of analyticity, and Carnap, who it portrays as just behind Frége, was jointly responsible for the appearance of concept-containment analyticity.
Frége was clear about the difference between concept containment and logical containment, expressing it as like the difference between the containment of ‘beams in a house’ the containment of a ‘plant in the seed’ (Frége, 1853). But he found the former, as Kant formulated it, defective in three ways: It explains analyticity in psychological terms, it does not cover all cases of analytic propositions, and, perhaps, most important for Frége’s logicism, its notion of containment is ‘unfruitful’ as a definition: Mechanisms in logic and mathematics (Frége, 1853). In an insidious containment between the two notions of containment, Frége observes that with logical containment ‘we are not simply talking out of the box again what we have just put inti it’. This definition makes logical containment the basic notion. Analyticity becomes a special case of logical truth, and, even in this special case, the definitions employ the power of definition in logic and mathematics than mere concept combination.
Carnap, attempting to overcome what he saw a shortcoming in Frége’s account of analyticity, took the remaining step necessary to do away explicitly with Lockean-Kantian analyticity. As Carnap saw things, it was a shortcoming of Frége’s explanation that it seems to suggest that definitional relation underlying analytic propositions can be extra-logic in some sense, say, in resting on linguistic synonymy. To Carnap, this represented a failure to achieve a uniform formal treatment of analytic propositions and left ‘us’ with a dubious distinction between logical and extra-logical vocabulary. Hence, he eliminated the reference to definitions in Frége’s explanation of analyticity by introducing ‘meaning postulates’, e.g., statements such as (∀χ) (χ is a bachelor-is unmarried) (Carnap, 1965). Like standard logical postulate on which they were modelled, meaning postulates express nothing more than constrains on the admissible models with respect to which sentences and deductions are evaluated for truth and validity. Thus, despite their name, its asymptomatic-balance having to pustulate itself by that in what it holds on to not more than to do with meaning than any value-added statements expressing an indispensable truth. In defining analytic propositions as consequences of (an explained set of) logical laws, Carnap explicitly removed the one place in Frége’s explanation where there might be room for concept containment and with it, the last trace of Locke’s distinction between semantic and other ‘necessary consequences’.
Quine, the staunchest critic of analyticity of our time, performed an invaluable service on its behalf-although, one that has come almost completely unappreciated. Quine made two devastating criticism of Carnap’s meaning postulate approach that expose it as both irrelevant and vacuous. It is irrelevant because, in using particular words of a language, meaning postulates fail to explicate analyticity for sentences and languages generally, that is, they do not, in fact, bring definition to it for variables ‘S’ and ‘L’ (Quine, 1953). It is vacuous because, although meaning postulates tell ‘us’ what sentences are to count as analytic, they do not tell ‘us’ what it is for them to be analytic.
Received opinion gas it that Quine did much more than refute the analytic/synthetic distinction as Carnap tried to draw it. Received opinion has that Quine demonstrated there is no distinction, however, anyone might try to draw it. Nut this, too, is incorrect. To argue for this stronger conclusion, Quine had to show that there is no way to draw the distinction outside logic, in particular theory in linguistic corresponding to Carnap’s, Quine’s argument had to take an entirely different form. Some inherent feature of linguistics had to be exploited in showing that no theory in this science can deliver the distinction. But the feature Quine chose was a principle of operationalist methodology characteristic of the school of Bloomfieldian linguistics. Quine succeeds in showing that meaning cannot be made objective sense of in linguistics. If making sense of a linguistic concept requires, as that school claims, operationally defining it in terms of substitution procedures that employ only concepts unrelated to that linguistic concept. But Chomsky’s revolution in linguistics replaced the Bloomfieldian taxonomic model of grammars with the hypothetico-deductive model of generative linguistics, and, as a consequence, such operational definition was removed as the standard for concepts in linguistics. The standard of theoretical definition that replaced it was far more liberal, allowing the members of as family of linguistic concepts to be defied with respect to one another within a set of axioms that state their systematic interconnections -the entire system being judged by whether its consequences are confirmed by the linguistic facts. Quine’s argument does not even address theories of meaning based on this hypothetico-deductive model (Katz, 1988, Katz, 1990).
Putman, the other staunch critic of analyticity, performed a service on behalf of analyticity fully on a par with, and complementary to Quine’s, whereas, Quine refuted Carnap’s formalization of Frége’s conception of analyticity, Putman refuted this very conception itself. Putman put an end to the entire attempt, initiated by Frége and completed by Carnap, to construe analyticity as a logical concept (Putman, 1962, 1970, 1975).
However, as with Quine, received opinion has it that Putman did much more. Putman in credited with having devised science fiction cases, from the robot cat case to the twin earth cases, that are counter examples to the traditional theory of meaning. Again, received opinion is incorrect. These cases are only counter examples to Frége’s version of the traditional theory of meaning. Frége’s version claims both (1) that senses determines reference, and (2) that there are instances of analyticity, say, typified by ‘cats are animals’, and of synonymy, say typified by ‘water’ in English and ‘water’ in twin earth English. Given (1) and (2), what we call ‘cats’ could not be non-animals and what we call ‘water’ could not differ from what the earthier twin called ‘water’. But, as Putman’s cases show, what we call ‘cats’ could be Martian robots and what they call ‘water’ could be something other than H2O Hence, the cases are counter examples to Frége’s version of the theory.
Putman himself takes these examples to refute the traditional theory of meaning per se, because he thinks other versions must also subscribe to both (1) and. (2). He was mistaken in the case of (1). Frége’s theory entails (1) because it defines the sense of an expression as the mode of determination of its referent (Frége, 1952, pp. 56-78). But sense does not have to be defined this way, or in any way that entails (1).it can be defined as (D).
(D) Sense is that aspect of the grammatical structure of expressions and sentences responsible for their having sense properties and relations like meaningfulness, ambiguity, antonymy, synonymy, redundancy, analyticity and analytic entailment. (Katz, 1972 & 1990). (Note that this use of sense properties and relations is no more circular than the use of logical properties and relations to define logical form, for example, as that aspect of grammatical structure of sentences on which their logical implications depend.)
Again, (D) makes senses internal to the grammar of a language and reference an external; matter of language use -typically involving extra-linguistic beliefs, Therefore, (D) cuts the strong connection between sense and reference expressed in (1), so that there is no inference from the modal fact that ‘cats’ refer to robots to the conclusion that ‘Cats are animals’ are not analytic. Likewise, there is no inference from ‘water’ referring to different substances on earth and twin earth to the conclusion that our word and theirs are not synonymous. Putman’s science fiction cases do not apply to a version of the traditional theory of meaning based on (D).
The success of Putman and Quine’s criticism in application to Frége and Carnap’s theory of meaning together with their failure in application to a theory in linguistics based on (D) creates the option of overcoming the shortcomings of the Lockean-Kantian notion of analyticity without switching to a logical notion. this option was explored in the 1960s and 1970s in the course of developing a theory of meaning modelled on the hypothetico-deductive paradigm for grammars introduced in the Chomskyan revolution (Katz, 1972).
This theory automatically avoids Frége’s criticism of the psychological formulation of Kant’s definition because, as an explication of a grammatical notion within linguistics, it is stated as a formal account of the structure of expressions and sentences. The theory also avoids Frége’s criticism that concept-containment analyticity is not ‘fruitful’ enough to encompass truths of logic and mathematics. The criticism rests on the dubious assumption, parts of Frége’s logicism, that analyticity ‘should’ encompass them, (Benacerraf, 1981). But in linguistics where the only concern is the scientific truth about natural concept-containment analyticity encompass truths of logic and mathematics. Moreover, since we are seeking the scientific truth about trifling propositions in natural language, we will eschew relations from logic and mathematics that are too fruitful for the description of such propositions. This is not to deny that we want a notion of necessary truth that goes beyond the trifling, but only to deny that, that notion is the notion of analyticity in natural language.
The remaining Frégean criticism points to a genuine incompleteness of the traditional account of analyticity. There are analytic relational sentences, for example, Jane walks with those with whom she strolls, ’Jack kills those he himself has murdered’, etc., and analytic entailment with existential conclusions, for example, ‘I think’, therefore ‘I exist’. The containment in these sentences is just as literal as that in an analytic subject-predicate sentence like ‘Bachelors are unmarried’, such are shown to have a theory of meaning construed as a hypothetico-deductive systemizations of sense as defined in (D) overcoming the incompleteness of the traditional account in the case of such relational sentences.
Such a theory of meaning makes the principal concern of semantics the explanation of sense properties and relations like synonymy, an antonymy, redundancy, analyticity, ambiguity, etc. Furthermore, it makes grammatical structure, specifically, senses structure, the basis for explaining them. This leads directly to the discovery of a new level of grammatical structure, and this, in turn, makes possible a proper definition of analyticity. To see this, consider two simple examples. It is a semantic fact that ‘a male bachelor’ is redundant and that ‘spinsters’ are synonymous with ‘women who never married’. In the case of the redundancy, we have to explain the fact that the sense of the modifier ‘male’ is already contained in the sense of its head ‘bachelor’. In the case of the synonymy, we have to explain the fact that the sense of ‘sinister’ is identical to the sense of ‘woman who never married’ (compositionally formed from the senses of ‘woman’, ‘never’ and ‘married’). But is so fas as such facts concern relations involving the components of the senses of ‘bachelor’ and ‘spinster’ and is in as these words were simply syntactic, there must be a level of grammatical structure at which simpler of the syntactical remain semantically complex. This, in brief, is the route by which we arrive a level of ‘decompositional semantic structure; that is the locus of sense structures masked by syntactically simple words.
Discovery of this new level of grammatical structure was followed by attemptive efforts as afforded to represent the structure of the sense’s finds there. Without going into detail of sense representations, it is clear that, once we have the notion of decompositional representation, we can see how to generalize Locke and Kant’s informal, subject-predicate account of analyticity to cover relational analytic sentences. Let a simple sentence ‘S’ consisted of some placed predicate ‘P’ with terms T1 . . . , . Tn occupying its argument places.
The analysis in case, first, S has a term T1 that consists of a place predicate Q (m > n or m = n) with terms occupying its argument places, and second, P is contained in Q and, for each term TJ. . . . T1 + I, . . . . , Tn, TJ is contained in the term of Q that occupies the argument place in Q corresponding to the argument place occupied by TJ in P. (Katz, 1972)
To see how (A) works, suppose that ‘stroll’ in ‘Jane walks with those whom she strolls’ is decompositionally represented as having the same sense as ‘walk idly and in a leisurely way’. The sentence is analytic by (A) because the predicate ‘stroll’ (the sense of ‘stroll) and the term ‘Jane’ * the sense of ‘Jane’ associated with the predicate ‘walk’) is contained in the term ‘Jane’ (the sense of ‘she herself’ associated with the predicate ‘stroll’). The containment in the case of the other terms is automatic.
The fact that (A) itself makes no reference to logical operators or logical laws indicate that analyticity for subject-predicate sentences can be extended to simple relational sentences without treating analytic sentences as instances of logical truths. Further, the source of the incompleteness is no longer explained, as Frége explained it, as the absence of ‘fruitful’ logical apparatus, but is now explained as mistakenly treating what is only a special case of analyticity as if it were the general case. The inclusion of the predicate in the subject is the special case (where n = 1) of the general case of the inclusion of an–place predicate (and its terms) in one of its terms. Noting that the defects, by which, Quine complained of in connection with Carnap’s meaning-postulated explication are absent in (A). (A) contains no words from a natural language. It explicitly uses variable ‘S’ and variable ‘L’ because it is a definition in linguistic theory. Moreover, (A) tell ‘us’ what property is in virtue of which a sentence is analytic, namely, redundant predication, that is, the predication structure of an analytic sentence is already found in the content of its term structure.
Received opinion has been anti-Lockean in holding that necessary consequences in logic and language belong to one and the same species. This seems wrong because the property of redundant predication provides a non-logic explanation of why true statements made in the literal use of analytic sentences are necessarily true. Since the property ensures that the objects of the predication in the use of an analytic sentence are chosen on the basis of the features to be predicated of them, the truth-conditions of the statement are automatically satisfied once its terms take on reference. The difference between such a linguistic source of necessity and the logical and mathematical sources vindicate Locke’s distinction between two kinds of ‘necessary consequence’.
Received opinion concerning analyticity contains another mistake. This is the idea that analyticity is inimical to science, in part, the idea developed as a reaction to certain dubious uses of analyticity such as Frége’s attempt to establish logicism and Schlick’s, Ayer’s and other logical; postivists attempt to deflate claims to metaphysical knowledge by showing that alleged deductive truths are merely empty analytic truths (Schlick, 1948, and Ayer, 1946). In part, it developed as also a response to a number of cases where alleged analytic, and hence, necessary truths, e.g., the law of excluded a seeming next-to-last subsequent to have been taken as open to revision, such cases convinced philosophers like Quine and Putnam that the analytic/synthetic distinction is an obstacle to scientific progress.
The problem, if there is, one is one is not analyticity in the concept-containment sense, but the conflation of it with analyticity in the logical sense. This made it seem as if there is a single concept of analyticity that can serve as the grounds for a wide range of deductive truths. But, just as there are two analytic/synthetic distinctions, so there are two concepts of concept. The narrow Lockean/Kantian distinction is based on a narrow notion of expressions on which concepts are senses of expressions in the language. The broad Frégean/Carnap distinction is based on a broad notion of concept on which concepts are conceptions -often scientific one about the nature of the referent (s) of expressions (Katz, 1972) and curiously Putman, 1981). Conflation of these two notions of concepts produced the illusion of a single concept with the content of philosophical, logical and mathematical conceptions, but with the status of linguistic concepts. This encouraged philosophers to think that they were in possession of concepts with the contentual representation to express substantive philosophical claims, e.g., such as Frége, Schlick and Ayer’s, . . . and so on, and with a status that trivializes the task of justifying them by requiring only linguistic grounds for the deductive propositions in question.
Finally, there is an important epistemological implication of separating the broad and narrowed notions of analyticity. Frége and Carnap took the broad notion of analyticity to provide foundations for necessary and a priority, and, hence, for some form of rationalism, and nearly all rationalistically inclined analytic philosophers that followed them in this, thus, when Quine dispatched the Frége-Carnap position on analyticity, it was widely believed that necessary, as a priority, and rationalism had also been despatched, and, as a consequence. Quine had ushered in an ‘empiricism without dogmas’ and ‘naturalized epistemology’. But given there is still a notion of analyticity that enables ‘us’ to pose the problem of how necessary, synthetic deductive knowledge is possible (moreover, one whose narrowness makes logical and mathematical knowledge part of the problem), Quine did not undercut the foundations of rationalism. Hence, a serious reappraisal of the new empiricism and naturalized epistemology is, to any the least, is very much in order (Katz, 1990).
In some areas of philosophy and sometimes in things that are less than important we are to find in the deductively/inductive distinction in which has been applied to a wide range of objects, including concepts, propositions, truths and knowledge. Our primary concern will, however, be with the epistemic distinction between deductive and inductive knowledge. The most common way of marking the distinction is by reference to Kant’s claim that deductive knowledge is absolutely independent of all experience. It is generally agreed that S’s knowledge that ‘p’ is independent of experience just in case S’s belief that ‘p’ is justified independently of experience. Some authors (Butchvarov, 1970, and Pollock, 1974) are, however, in finding this negative characterization of deductive unsatisfactory knowledge and have opted for providing a positive characterisation in terms of the type of justification on which such knowledge is dependent. Finally, others (Putman, 1983 and Chisholm, 1989) have attempted to mark the distinction by introducing concepts such as necessity and rational unrevisability than in terms of the type of justification relevant to deductive knowledge.
One who characterizes deductive knowledge in terms of justification that is independent of experience is faced with the task of articulating the relevant sense of experience, and proponents of the deductive ly cites ‘intuition’ or ‘intuitive apprehension’ as the source of deductive justification. Furthermore, they maintain that these terms refer to a distinctive type of experience that is both common and familiar to most individuals. Hence, there is a broad sense of experience in which deductive justification is dependent of experience. An initially attractive strategy is to suggest that theoretical justification must be independent of sense experience. But this account is too narrow since memory, for example, is not a form of sense experience, but justification based on memory is presumably not deductive. There appear to remain only two options: Provide a general characterization of the relevant sense of experience or enumerates those sources that are experiential. General characterizations of experience often maintain that experience provides information specific to the actual world while non-experiential sources provide information about all possible worlds. This approach, however, reduces the concept of non-experiential justification to the concept of being justified in believing a necessary truth. Accounts by enumeration have two problems (1) there is some controversy about which sources to include in the list, and (2) there is no guarantee that the list is complete. It is generally agreed that perception and memory should be included. Introspection, however, is problematic, and beliefs about one’s conscious states and about the manner in which one is appeared to are plausible regarded as experientially justified. Yet, some, such as Pap (1958), maintain that experiments in imagination are the source of deductive justification. Even if this contention is rejected and deductive justification is characterized as justification independent of the evidence of perception, memory and introspection, it remains possible that there are other sources of justification. If it should be the case that clairvoyance, for example, is a source of justified beliefs, such beliefs would be justified deductively on the enumerative account.
The most common approach to offering a positive characterization of deductive justification is to maintain that in the case of basic deductive propositions, understanding the proposition is sufficient to justify one in believing that it is true. This approach faces two pressing issues. What is it to understand a proposition in the manner that suffices for justification? Proponents of the approach typically distinguish understanding the words used to express a proposition from apprehending the proposition itself and maintain that being relevant to deductive justification is the latter which. But this move simply shifts the problem to that of specifying what it is to apprehend a proposition. Without a solution to this problem, it is difficult, if possible, to evaluate the account since one cannot be sure that the account since on cannot be sure that the requisite sense of apprehension does not justify paradigmatic inductive propositions as well. Even less is said about the manner in which apprehending a proposition justifies one in believing that it is true. Proponents are often content with the bald assertions that one who understands a basic deductive proposition can thereby ‘see’ that it is true. But what requires explanation is how understanding a proposition enable one to see that it is true.
Difficulties in characterizing deductive justification in a term either of independence from experience or of its source have led, out-of-the-ordinary to present the concept of necessity into their accounts, although this appeal takes various forms. Some have employed it as a necessary condition for deductive justification, others have employed it as a sufficient condition, while still others have employed it as both. In claiming that necessity is a criterion of the deductive. Kant held that necessity is a sufficient condition for deductive justification. This claim, however, needs further clarification. There are three theses regarding the relationship between theoretical and the necessary, which can be distinguished: (i) if ‘p’ is a necessary proposition and ‘S’ is justified in believing that ‘p’ is necessary, then S’s justification is deductive: (ii) If ‘p’ is a necessary proposition and ‘S’ is justified in believing that ‘p’ is necessarily true, then S’s justification is deductive: And (iii) If ‘p’ is a necessary proposition and ‘S’ is justified in believing that ‘p’, then S’s justification is deductive. For example, many proponents of deductive contend that all knowledge of a necessary proposition is deductive. (ii) and (iii) have the shortcoming of setting by stipulation the issue of whether inductive knowledge of necessary propositions is possible. (i) does not have this shortcoming since the recent examples offered in support of this claim by Kriple (1980) and others have been cases where it is alleged that knowledge of the ‘truth value’ of necessary propositions is knowable inductive. (i) has the shortcoming, however, of either ruling out the possibility of being justified in believing that a proposition is necessary on the basis of testimony or else sanctioning such justification as deductive. (ii) and (iii), of course, suffer from an analogous problem. These problems are symptomatic of a general shortcoming of the approach: It attempts to provide a sufficient condition for deductive justification solely in terms of the modal status of the proposition believed without making reference to the manner in which it is justified. This shortcoming, however, can be avoided by incorporating necessity as a necessary but not sufficient condition for knowable justification as, for example, in Chisholm (1989). Here there are two theses that must be distinguished: (1) If ‘S’ is justified deductively in believing that ‘p’, then ‘p’ is necessarily true. (2) If ‘S’ is justified deductively in believing that ‘p’. Then ‘p’ is a necessary proposition. (1) and (2), however, allows this possibility. A further problem with both (1) and (2) is that it is not clear whether they permit deductively justified beliefs about the modal status of a proposition. For they require that in order for ‘S’ to be justified deductively in believing that ‘p’ is a necessary preposition it must be necessary that ‘p’ is a necessary proposition. But the status of iterated modal propositions is controversial. Finally, (1) and (2) both preclude by stipulation the position advanced by Kripke (1980) and Kitcher (1980) that there is deductive knowledge of contingent propositions.
The concept of rational unrevisability has also been invoked to characterize deductive justification. The precise sense of rational unrevisability has been presented in different ways. Putnam (1983) takes rational unrevisability to be both a necessary and sufficient condition for deductive justification while Kitcher (1980) takes it to be only a necessary condition. There are also two different senses of rational unrevisability that have been associated with the deductive (I) a proposition is weakly unreviable just in case it is rationally unrevisable in light of any future ‘experiential’ evidence, and (II) a proposition is strongly unrevisable just in case it is rationally unrevisable in light of any future evidence. Let us consider the plausibility of requiring either form of rational unrevisability as a necessary condition for deductive justification. The view that a proposition is justified deductive only if it is strongly unrevisable entails that if a non-experiential source of justified beliefs is fallible but self-correcting, it is not a deductive source of justification. Casullo (1988) has argued that it vis implausible to maintain that a proposition that is justified non-experientially is ‘not’ justified deductively merely because it is revisable in light of further non-experiential evidence. The view that a proposition is justified deductively only if it is, weakly unrevisable is not open to this objection since it excludes only recision in light of experiential evidence. It does, however, face a different problem. To maintain that ‘S’s’ justified belief that ‘p’ is justified deductively is to make a claim about the type of evidence that justifies ‘S’ in believing that ‘p’. On the other hand, to maintain that S’s justified belief that ‘p’ is rationally revisable in light of experiential evidence is to make a claim about the type of evidence that can defeat ‘S’s’ justification for believing that ‘p’ that a claim about the type of evidence that justifies ‘S’ in believing that ‘p’. Hence, it has been argued by Edidin (1984) and Casullo (1988) that to hold that a belief is justified deductively only if it is weakly unrevisable is either to confuse supporting evidence with defeating evidence or to endorse some implausible this about the relationship between the two such that if evidence of the sort as the kind ‘A’ can be in defeat, the justification conferred on ‘S’s’ belief that ‘p’ by evidence of kind ‘B’ then S’s justification for believing that ‘p’ is based on evidence of kind ‘A’.
The most influential idea in the theory of meaning in the past hundred years is the thesis that the meaning of an indicative sentence is given by its truth-conditions. On this conception, to understand a sentence is to know its truth-conditions. The conception was first clearly formulated by Frége, was developed in a distinctive way by the early Wittgenstein, and is a leading idea of Donald Herbert Davidson (1917-), who is also known for rejection of the idea of as conceptual scheme, thought of as something peculiar to one language or one way of looking at the world, arguing that where the possibility of translation stops so dopes the coherence of the idea that there is anything to translate. His [papers are collected in the “Essays on Actions and Events” (1980) and “Inquiries into Truth and Interpretation” (1983). However, the conception has remained so central that those who offer opposing theories characteristically define their position by reference to it.
Wittgenstein’s main achievement is a uniform theory of language that yields an explanation of logical truth. A factual sentence achieves sense by dividing the possibilities exhaustively into two groups, those that would make it true and those that would make it false. A truth of logic does not divide the possibilities but comes out true in all of them. It, therefore, lacks sense and says nothing, but it is not nonsense. It is a self-cancellation of sense, necessarily true because it is a tautology, the limiting case of factual discourse, like the figure ‘0' in mathematics. Language takes many forms and even factual discourse does not consist entirely of sentences like ‘The fork is placed to the left of the knife’. However, the first thing that he gave up was the idea that this sentence itself needed further analysis into basic sentences mentioning simple objects with no internal structure. He was to concede, that a descriptive word will often get its meaning partly from its place in a system, and he applied this idea to colour-words, arguing that the essential relations between different colours do not indicate that each colour has an internal structure that needs to be taken apart. On the contrary, analysis of our colour-words would only reveal the same pattern-ranges of incompatible properties-recurring at every level, because that is how we carve up the world.
Indeed, it may even be the case that of our ordinary language is created by moves that we ourselves make. If so, the philosophy of language will lead into the connection between the meaning of a word and the applications of it that its users intend to make. There is also an obvious need for people to understand each other’s meanings of their words. There are many links between the philosophy of language and the philosophy of mind and it is not surprising that the impersonal examination of language in the “Tractatus: was replaced by a very different, anthropocentric treatment in “Philosophical Investigations?”
If the logic of our language is created by moves that we ourselves make, various kinds of realisms are threatened. First, the way in which our descriptive language carves up the world will not be forces on ‘us’ by the natures of things, and the rules for the application of our words, which feel the external constraints, will really come from within ‘us’. That is a concession to nominalism that is, perhaps, readily made. The idea that logical and mathematical necessity is also generated by what we ourselves accomplish what is more paradoxical. Yet, that is the conclusion of Wittengenstein (1956) and (1976), and here his anthropocentricism has carried less conviction. However, a paradox is not sure of error and it is possible that what is needed here is a more sophisticated concept of objectivity than Platonism provides.
In his later work Wittgenstein brings the great problem of philosophy down to earth and traces them to very ordinary origins. His examination of the concept of ‘following a rule’ takes him back to a fundamental question about counting things and sorting them into types: ‘What qualifies as doing the same again? Of a courser, this question as an inconsequential fundamental and would suggest that we forget it and get on with the subject. But Wittgenstein’s question is not so easily dismissed. It has the naive profundity of questions that children ask when they are first taught a new subject. Such questions remain unanswered without detriment to their learning, but they point the only way to complete understanding of what is learned.
It is, nevertheless, the meaning of a complex expression in a function of the meaning of its constituents, that is, indeed, that it is just a statement of what it is for an expression to be semantically complex. It is one of the initial attractions of the conception of meaning as truths-conditions that it permits a smooth and satisfying account of the way in which the meaning of a complex expression is a dynamic function of the meaning of its constituents. On the truth-conditional conception, to give the meaning of an expression is to state the contribution it makes to the truth-conditions of sentences in which it occurs. for singular terms-proper names, indexicals, and certain pronoun’s - this is done by stating the reference of the term in question.
The truth condition of a statement is the condition the world must meet if the statement is to be true. To know this condition is equivalent to knowing the meaning of the statement. Although, this sounds as if it gives a solid anchorage for meaning, some of the security disappears when it turns out that the truth condition can only be defined by repeating the very same statement, the truth condition of ‘snow is white’ is that snow is white, the truth condition of ‘Britain would have capitulated had Hitler invaded’ is that Britain would halve capitulated had Hitler invaded. It is disputed whether this element of running-on-the-spot disqualifies truth conditions from playing the central role in a substantive theory of meaning. Truth-conditional theories of meaning are sometimes opposed by the view that to know the meaning of a statement is to be able to users it in a network of inferences.
On the truth-conditional conception, to give the meaning of expressions is to state the contributive function it makes to the dynamic function of sentences in which it occurs. For singular terms-proper names, and certain pronouns, as well are indexicals-this is done by stating the reference of the term in question. For predicates, it is done either by stating the conditions under which the predicate is true of arbitrary objects, or by stating the conditions under which arbitrary atomic sentence containing it is true. The meaning of a sentence-forming operator is given by stating its distributive contribution to the truth-conditions of a complete sentence, as a function of the semantic values of the sentences on which it operates. For an extremely simple, but nonetheless, it is a structured language, we can state the contributions various expressions make to truth conditions as follows:
A1: The referent of ‘London’ is London.
A2: The referent of ‘Paris’ is Paris.
A3: Any sentence of the form ‘a is beautiful’ is true if and only if the referent of ‘a’ is beautiful.
A4: Any sentence of the form ‘a is larger than b’ is true if and only if the referent of ‘a’ is larger than the referent of ‘b’.
A5: Any sentence of the form ‘It is not the case that A’ is true if and only if it is not the case that ‘A’ is true.
A6: Any sentence of the form “A and B’ are true if and only is ‘A’ is true and ‘B’ is true.
The principle’s A2-A6 form a simple theory of truth for a fragment of English. In this theory, it is possible to derive these consequences: That ‘Paris is beautiful’ is true if and only if Paris is beautiful (from A2 and A3), which ‘London is larger than Paris and it is not the cases that London is beautiful’ is true if and only if London is larger than Paris and it is not the case that London is beautiful (from A1 - As): And in general, for any sentence ‘A’ of this simple language, we can derive something of the form ‘A’ is true if and only if A’.
The theorist of truth conditions should insist that not every true statement about the reference of an expression be fit to be an axiom in a meaning-giving theory of truth for a language. The axiom: London’ refers to the city in which there was a huge fire in 1666 is a true statement about the reference of ‘London?’. It is a consequence of a theory that substitutes this axiom for A! In our simple truth theory that ‘London is beautiful’ is true if and only if the city in which there was a huge fire in 1666 is beautiful. Since a subject can understand the name ‘London’ without knowing that last-mentioned truth conditions, this replacement axiom is not fit to be an axiom in a meaning-specifying truth theory. It is, of course, incumbent on a theorist of meaning as truth conditions to state the constraints on the acceptability of axioms in a way that does not presuppose a deductive, non-truth conditional conception of meaning.
Among the many challenges facing the theorist of truth conditions, two are particularly salient and fundamental. First, the theorist has to answer the charge of triviality or vacuity. Second, the theorist must offer an account of what it is for a person’s language to be truly descriptive by a semantic theory containing a given semantic axiom.
We can take the charge of triviality first. In more detail, it would run thus: Since the content of a claim that the sentence ‘Paris is beautiful’ in which is true of the divisional region, which is no more than the claim that Paris is beautiful, we can trivially describe understanding a sentence, if we wish, as knowing its truth-conditions, but this gives ‘us’ no substantive account of understanding whatsoever. Something other than a grasp to truth conditions must provide the substantive account. The charge rests upon what has been called the redundancy theory of truth, the theory that, is somewhat more discriminative. Horwich calls the minimal theory of truth, or deflationary view of truth, as fathered by Frége and Ramsey. The essential claim is that the predicate’ . . . is true’ does not have a sense, i.e., expresses no substantive or profound or explanatory concepts that ought be the topic of philosophical enquiry. The approach admits of different versions, but centres on the points (1) that ‘it is true that p’ says no more nor less than ‘p’ (hence redundancy) (2) that in less direct context, such as ‘everything he said was true’, or ‘all logical consequences of true propositions are true’, the predicate functions as a device enabling ‘us’; to generalize than as an adjective or predicate describing the thing he said, or the kinds of propositions that follow from true propositions. For example, the second may translate as ‘ (∀ p, q) (p & p ➝ q ➝q) ‘ where there is no use of a notion of truth.
There are technical problems in interpreting all uses of the notion of truth in such ways, but they are not generally felt to be insurmountable. The approach needs to explain away apparently substantive uses of the notion, such a; science aims at the truth’, or ‘truth is a norm governing discourse’. Indeed, postmodernist writing frequently advocates that we must abandon such norms, along with a discredited ‘objective’ conception of truth. But perhaps, we can have the norms even when objectivity is problematic, since they can be framed without mention of truth: Science wants it to be so that whenever science holds that ‘p’. Then ‘p’. Discourse is to be regulated by the principle that it is wrong to assert ‘p’ when ‘not-p’.
The disquotational theory of truth finds that the simplest formulation is the claim that expressions of the fern ‘S is true’ mean the same as expressions of the form ’S’. Some philosophers dislike the idea of sameness of meaning, and if this is disallowed, then the claim is that the two forms are equivalent in any sense of equivalence that matters. That is, it makes no difference whether people say ‘Dogs bark’ is true, or whether they say that ‘dogs bark’. In the former representation of what they say the sentence ‘Dogs bark’ is mentioned, but in the latter it appears to be used, so the claim that the two are equivalent needs careful formulation and defence. On the face of it someone might know that ‘Dogs bark’ is true without knowing what it means, for instance, if one were to find it in a list of acknowledged truths, although he does not understand English, and this is different from knowing that dogs bark. Disquotational theories are usually presented as versions of the redundancy theory of truth.
The minimal theory states that the concept of truth is exhausted by the fact that it conforms to the equivalence principle, the principle that for any proposition ‘p’, it is true that ‘p’ if and only if ‘p’. Many different philosophical theories of truth will, with suitable qualifications, accept that equivalence principle. The distinguishing feature of the minimal theory is its claim that the equivalence principle exhausts the notion of truths. It is how widely accepted, that both by opponents and supporters of truth conditional theories of meaning, that it is inconsistent to accept both minimal theory of truth and a truth conditional account of meaning (Davidson, 1990, Dummett, 1959 and Horwich, 1990). If the claim that the sentence ‘Paris is beautiful’ is true is exhausted by its equivalence to the claim that Paris is beautiful, it is circular to try to explain the sentence’s meaning in terms of its truth conditions. The minimal theory of truth has been endorsed by Ramsey, Ayer, the later Wittgenstein, Quine, Strawson, Horwich and-confusingly and inconsistently if be it correct. ~ Frége himself. But is the minimal theory correct?
The minimal or redundancy theory treats instances of the equivalence principle as definitional of truth for a given sentence. But in fact, it seems that each instance of the equivalence principle can itself be explained. The truths from which such an instance as.
‘London is beautiful’ is true if and only if London is beautiful
preserve a right to be interpreted specifically of A1 and A3 above? This would be a pseudo-explanation if the fact that ‘London’ refers to ‘London is beautiful’ has the truth-condition it does. But that is very implausible: It is, after all, possible to understand in the name ‘London’ without understanding the predicate ‘is beautiful’. The idea that facts about the reference of particular words can be explanatory of facts about the truth conditions of sentences containing them in no way requires any naturalistic or any other kind of reduction of the notion of reference. Nor is the idea incompatible with the plausible point that singular reference can be attributed at all only to something that is capable of combining with other expressions to form complete sentences. That still leaves room for facts about an expression’s having the particular reference it does to be partially explanatory of the particular truth condition possessed by a given sentence containing it. The minimal; Theory thus treats as definitional or stimulative something that is in fact open to explanation. What makes this explanation possible is that there is a general notion of truth that has, among the many links that hold it in place, systematic connections with the semantic values of sub-sentential expressions.
A second problem with the minimal theory is that it seems impossible to formulate it without at some point relying implicitly on features and principles involving truths that go beyond anything countenanced by the minimal theory. If the minimal theory treats truth as a predicate of anything linguistic, be it utterances, type-in-a-language, or whatever, then the equivalence schema will not cover all cases, but only of those in the theorist’s own language. Some account has to be given of truth for sentences of other languages. Speaking of the truth of language-independence propositions or thoughts will only postpone, not avoid, this issue, since at some point principles have to be stated associating these language-independent entities with sentences of particular languages. The defender of the minimalist theory is likely to say that if a sentence ‘S’ of a foreign language is best translated by our sentence ‘p’, then the foreign sentence ‘S’ is true if and only if ‘p’. Now the best translation of a sentence must preserve the concepts expressed in the sentence. Constraints involving a general notion of truth are persuasive in a plausible philosophical theory of concepts. It is, for example, a condition of adequacy on an individualized account of any concept that there exists what is called ‘Determination Theory’ for that account-that is, a specification of how the account contributes to fixing the semantic value of that concept, the notion of a concept’s semantic value is the notion of something that makes a certain contribution to the truth conditions of thoughts in which the concept occurs. but this is to presuppose, than to elucidate, a general notion of truth.
It is also plausible that there are general constraints on the form of such Determination Theories, constraints that involve truth and which are not derivable from the minimalist’s conception. Suppose that concepts are individuated by their possession conditions. A concept is something that is capable of being a constituent of such contentual representational in a way of thinking of something-a particular object, or property, or relation, or another entity. A possession condition may in various says makes a thanker’s possession of a particular concept dependent upon his relations to his environment. Many possession conditions will mention the links between a concept and the thinker’s perceptual experience. Perceptual experience represents the world for being a certain way. It is arguable that the only satisfactory explanation of what it is for perceptual experience to represent the world in a particular way must refer to the complex relations of the experience to the subject’s environment. If this is so, then mention of such experiences in a possession condition will make possession of that condition will make possession of that concept dependent in part upon the environment relations of the thinker. Burge (1979) has also argued from intuitions about particular examples that, even though the thinker’s non-environmental properties and relations remain constant, the conceptual content of his mental state can vary if the thinker’s social environment is varied. A possession condition which property individuates such a concept must take into account the thinker’s social relations, in particular his linguistic relations.
One such plausible general constraint is then the requirement that when a thinker forms beliefs involving a concept in accordance with its possession condition, a semantic value is assigned to the concept in such a way that the belief is true. Some general principles involving truth can indeed, as Horwich has emphasized, be derived from the equivalence schema using minimal logical apparatus. Consider, for instance, the principle that ‘Paris is beautiful and London is beautiful’ is true if and only if ‘Paris is beautiful’ is true if and only if ‘Paris is beautiful’ is true and ‘London is beautiful’ is true. This follows logically from the three instances of the equivalence principle: ‘Paris is beautiful and London is beautiful’ is rue if and only if Paris is beautiful, and ‘London is beautiful’ is true if and only if London is beautiful. But no logical manipulations of the equivalence schemas will allow the deprivation of that general constraint governing possession conditions, truth and the assignment of semantic values. That constraint can have courses be regarded as a further elaboration of the idea that truth is one of the aims of judgement.
We now turn to the other question, ‘What is it for a person’s language to be correctly describable by a semantic theory containing a particular axiom, such as the axiom A6 above for conjunction?’ This question may be addressed at two depths of generality. At the shallower level, the question may take for granted the person’s possession of the concept of conjunction, and be concerned with what has to be true for the axiom correctly to describe his language. At a deeper level, an answer should not duck the issue of what it is to possess the concept. The answers to both questions are of great interest: We will take the lesser level of generality first.
When a person means conjunction by ‘sand’, he is not necessarily capable of formulating the axiom A6 explicitly. Even if he can formulate it, his ability to formulate it is not the causal basis of his capacity to hear sentences containing the word ‘and’ as meaning something involving conjunction. Nor is it the causal basis of his capacity to mean something involving conjunction by sentences he utters containing the word ‘and’. Is it then right to regard a truth theory as part of an unconscious psychological computation, and to regard understanding a sentence as involving a particular way of depriving a theorem from a truth theory at some level of conscious proceedings? One problem with this is that it is quite implausible that everyone who speaks the same language has to use the same algorithms for computing the meaning of a sentence. In the past thirteen years, thanks particularly to the work of Davies and Evans, a conception has evolved according to which an axiom like A6 is true of a person’s language only if there is a common component in the explanation of his understanding of each sentence containing the word ‘and’, a common component that explains why each such sentence is understood as meaning something involving conjunction (Davies, 1987). This conception can also be elaborated in computational terms: Suggesting that for an axiom like A6 to be true of a person’s language is for the unconscious mechanisms which produce understanding to draw on the information that a sentence of the form ‘A and B’ are true if and only if ‘A’ is true and ‘B’ is true (Peacocke, 1986). Many different algorithms may equally draw n this information. The psychological reality of a semantic theory thus involves, in Marr’s (1982) famous classification, something intermediate between his level one, the function computed, and his level two, the algorithm by which it is computed. This conception of the psychological reality of a semantic theory can also be applied to syntactic and phonol logical theories. Theories in semantics, syntax and phonology are not themselves required to specify the particular algorithms that the language user employs. The identification of the particular computational methods employed is a task for psychology. But semantics, syntactic and phonology theories are answerable to psychological data, and are potentially refutable by them-for these linguistic theories do make commitments to the information drawn upon by mechanisms in the language user.
This answer to the question of what it is for an axiom to be true of a person’s language clearly takes for granted the person’s possession of the concept expressed by the word treated by the axiom. In the example of the axiom A6, the information drawn upon is that sentences of the form ‘A and B’ are true if and only if ‘A’ is true and ‘B’ is true. This informational content employs, as it has to if it is to be adequate, the concept of conjunction used in stating the meaning of sentences containing ‘and’. So the computational answer we have returned needs further elaboration if we are to address the deeper question, which does not want to take for granted possession of the concepts expressed in the language. It is at this point that the theory of linguistic understanding has to draws upon a theory of concepts. It is plausible that the concepts of conjunction are individuated by the following condition for a thinker to possess it.
Finally, this response to the deeper question allows ‘us’ to answer two challenges to the conception of meaning as truth-conditions. First, there was the question left hanging earlier, of how the theorist of truth-conditions is to say what makes one axiom of a semantic theory is correctly in that of another, when the two axioms assign the same semantic values, but do so by means of different concepts. Since the different concepts will have different possession conditions, the dovetailing accounts, at the deeper level of what it is for each axiom to be correct for a person’s language will be different accounts. Second, there is a challenge repeatedly made by the minimalist theorists of truth, to the effect that the theorist of meaning as truth-conditions should give some non-circular account of what it is to understand a sentence, or to be capable of understanding all sentences containing a given constituent. For each expression in a sentence, the corresponding dovetailing account, together with the possession condition, supplies a non-circular account of what it is to understand any sentence containing that expression. The combined accounts for each of he expressions that comprise a given sentence together constitute a non-circular account of what it is to understand the compete sentences. Taken together, they allow the theorists of meaning as truth-conditions fully to meet the challenge.
A curious view common to that which is expressed by an utterance or sentence: The proposition or claim made about the world. By extension, the content of a predicate or other sub-sentential component is what it contributes to the content of sentences that contain it. The nature of content is the central concern of the philosophy of language, in that mental states have contents: A belief may have the content that the prime minister will resign. A concept is something that is capable of bringing a constituent of such contents. More specifically, a concept is a way of thinking of something-a particular object, or property or relation, or another entity. Such a distinction was held in Frége’s philosophy of language, explored in “On Concept and Object” (1892). Frége regarded predicates as incomplete expressions, in the same way as a mathematical expression for a function, such as sines . . . a log . . . , is incomplete. Predicates refer to concepts, which themselves are ‘unsaturated’, and cannot be referred to by subject expressions (we thus get the paradox that the concept of a horse is not a concept). Although Frége recognized the metaphorical nature of the notion of a concept being unsaturated, he was rightly convinced that some such notion is needed to explain the unity of a sentence, and to prevent sentences from being thought of as mere lists of names.
Several different concepts may each be ways of thinking of the same object. A person may think of himself in the first-person way, or think of himself as the spouse of Mary Smith, or as the person located in a certain room now. More generally, a concept ‘c’ is distinct from a concept ‘d’ if it is possible for a person rationally to believe ‘d is such-and-such’. As words can be combined to form structured sentences, concepts have also been conceived as combinable into structured complex contents. When these complex contents are expressed in English by ‘that . . . ’clauses, as in our opening examples, they will be capable of being true or false, depending on the way the world is.
The general system of concepts with which we organize our thoughts and perceptions are to encourage a conceptual scheme of which the outstanding elements of our every day conceptual formalities include spatial and temporal relations between events and enduring objects, causal relations, other persons, meaning-bearing utterances of others, . . . and so on. To see the world as containing such things is to share this much of our conceptual scheme. A controversial argument of Davidson’s urges that we would be unable to interpret speech from a different conceptual scheme as even meaningful, Davidson daringly goes on to argue that since translation proceeds according ti a principle of clarity, and since it must be possible of an omniscient translator to make sense of, ‘us’ we can be assured that most of the beliefs formed within the commonsense conceptual framework are true.
Concepts are to be distinguished from a stereotype and from conceptions. The stereotypical spy may be a middle-level official down on his luck and in need of money. None the less, we can come to learn that Anthony Blunt, art historian and Surveyor of the Queen’s Pictures, are a spy; we can come to believe that something falls under a concept while positively disbelieving that the same thing falls under the stereotype associated wit the concept. Similarly, a person’s conception of a just arrangement for resolving disputes may involve something like contemporary Western legal systems. But whether or not it would be correct, it is quite intelligible for someone to rejects this conception by arguing that it dies not adequately provide for the elements of fairness and respect that are required by the concepts of justice.
Basically, a concept is that which is understood by a term, particularly a predicate. To posses a concept is to be able to deploy a term expressing it in making judgements, in which the ability connection is such things as recognizing when the term applies, and being able to understand the consequences of its application. The term ‘idea’ was formally used in the came way, but is avoided because of its associations with subjective matters inferred upon mental imagery in which may be irrelevant ti the possession of a concept. In the semantics of Frége, a concept is the reference of a predicate, and cannot be referred to by a subjective term, although its recognition of as a concept, in that some such notion is needed to the explanatory justification of which that sentence of unity finds of itself from being thought of as namely categorized lists of itemized priorities.
A theory of a particular concept must be distinguished from a theory of the object or objects it selectively picks out. The theory of the concept is part if the theory of thought and epistemology. A theory of the object or objects is part of metaphysics and ontology. Some figures in the history of philosophy-and are open to the accusation of not having fully respected the distinction between the kinds of theory. Descartes appears to have moved from facts about the indubitability of the thought ‘I think’, containing the fist-person was of thinking, to conclusions about the nonmaterial nature of the object he himself was. But though the goals of a theory of concepts and a theory of objects are distinct, each theory is required to have an adequate account of its relation to the other theory. A theory if concept is unacceptable if it gives no account of how the concept is capable of picking out the object it evidently does pick out. A theory of objects is unacceptable if it makes it impossible to understand how we could have concepts of those objects.
A fundamental question for philosophy is: What individuates a given concept-that is, what makes it the one it is, rather than any other concept? One answer, which has been developed in great detail, is that it is impossible to give a non-trivial answer to this question (Schiffer, 1987). An alternative approach, addressees the question by starting from the idea that a concept id individuated by the condition that must be satisfied if a thinker is to posses that concept and to be capable of having beliefs and other attitudes whose content contains it as a constituent. So, to take a simple case, one could propose that the logical concept ‘and’ is individuated by this condition, it be the unique concept ‘C’ to posses that a thinker has to find these forms of inference compelling, without and ‘B’, ACB can be inferred, and from any premiss ACB, each of ‘A’ and ‘B’ can be inferred. Again, a relatively observational concept such as ‘round’ can be individuated in part by stating that the thinker finds specified contents containing it compelling when he has certain kinds of perception, and in part by relating those judgements containing the concept and which are not based on perception to those judgements that are. A statement that individuates a concept by saying what is required for a thinker to posses it can be described as giving the possession condition for the concept.
A possession condition for a particular concept may actually make use of that concept. The possession condition for ‘and’ does so. We can also expect to use relatively observational concepts in specifying the kind of experience that have to be mentioned in the possession conditions for relatively observational concepts. What we must avoid is mention of the concept in question as such within the content of the attitudes attributed to the thinker in the possession condition. Otherwise we would be presupposing possession of the concept in an account that was meant to elucidate its possession. In talking of what the thinker finds compelling, the possession conditions can also respect an insight of the later Wittgenstein: That to find her finds it natural to go on in new cases in applying the concept.
Sometimes a family of concepts has this property: It is not possible to master any one of the members of the family without mastering the others. Two of the families that plausibly have this status are these: The family consisting of some simple concepts 0, 1, 2, . . . of the natural numbers and the corresponding concepts of numerical quantifiers there are 0 so-and-so, there is 1 so-and-so, . . . and the family consisting of the concepts; belief’ and ‘desire’. Such families have come to be known as ‘local holism’. A local holism does not prevent the individuation of a concept by its possession condition. Rather, it demands that all the concepts in the family be individuated simultaneously. So one would say something of this form: Belief and desire form the unique pair of concepts C1 and C2 such that for as thinker to posses them are to meet such-and-such condition involving the thinker, C1 and C2. For these and other possession conditions to individuate properly, it is necessary that there be some ranking of the concepts treated. The possession conditions for concepts higher in the ranking must presuppose only possession of concepts at the same or lower levels in the ranking.
A possession conditions may in various way’s make a thinker’s possession of a particular concept dependent upon his relations to his environment. Many possession conditions will mention the links between a concept and the thinker’s perceptual experience. Perceptual experience represents the world as a certain way. It is arguable that the only satisfactory explanation of what it is for perceptual experience to represent the world in a particular way must refer to the complex relations of the experience to the subject’s environment. If this is so, then mention of such experiences in a possession condition will make possession of that concept dependent in part upon the environmental relations of the thinker. Burge (1979) has also argued from intuitions about particular examples that, even though the thinker’s non-environmental properties and relations remain constant, the conceptual content of his mental state can vary if the thinker’s social environment is varied. A possession condition that properly individuates such a concept must take into account the thinker’s social relations, in particular his linguistic relations.
Concepts have a normative dimension, a fact strongly emphasized by Kripke. For any judgement whose content involves a given concept, there is a correctness condition for that judgement, a condition that is dependent in part upon the identity of the concept. The normative character of concepts also extends into making the territory of a thinker’s reasons for making judgements. A thinker’s visual perception can give him good reason for judging ‘That man is bald’: It does not by itself give him good reason for judging ‘Rostropovich ids bald’, even if the man he sees is Rostropovich. All these normative connections must be explained by a theory of concepts one approach to these matters is to look to the possession condition for the concept, and consider how the referent of a concept is fixed from it, together with the world. One proposal is that the referent of the concept is that object (or property, or function, . . .) which makes the practices of judgement and inference mentioned which always lead to true judgements and truth-preserving inferences. This proposal would explain why certain reasons are necessity good reasons for judging given contents. Provided the possession condition permits ‘us’ to say what it is about a thinker’s previous judgements that masker it the case that he is employing one concept rather than another, this proposal would also have another virtue. It would allow ‘us’ to say how the correctness condition is determined for a judgement in which the concept is applied to newly encountered objects. The judgement is correct if the new object has the property that in fact makes the judgemental practices mentioned in the possession condition yield true judgements, or truth-preserving inferences.
These manifesting dissimilations have occasioned the affiliated differences accorded within the distinction as associated with Leibniz, who declares that there are only two kinds of truths-truths of reason and truths of fact. The forms are all either explicit identities, i.e., of the form ‘A is A’, ‘AB is B’, etc., or they are reducible to this form by successively substituting equivalent terms. Leibniz dubs them ‘truths of reason’ because the explicit identities are self-evident deducible truths, whereas the rest can be converted to such by purely rational operations. Because their denial involves a demonstrable contradiction, Leibniz also says that truths of reason ‘rest on the principle of contradiction, or identity’ and that they are necessary [propositions, which are true of all possible words. Some examples are ‘All equilateral rectangles are rectangles’ and ‘All bachelors are unmarried’: The first is already of the form AB is B’ and the latter can be reduced to this form by substituting ‘unmarried man’ fort ‘bachelor’. Other examples, or so Leibniz believes, are ‘God exists’ and the truths of logic, arithmetic and geometry.
Truths of fact, on the other hand, cannot be reduced to an identity and our only way of knowing them is empirically by reference to the facts of the empirical world. Likewise, since their denial does not involve a contradiction, their truth is merely contingent: They could have been otherwise and hold of the actual world, but not of every possible one. Some examples are ‘Caesar crossed the Rubicon’ and ‘Leibniz was born in Leipzig’, as well as propositions expressing correct scientific generalizations. In Leibniz’s view, truths of fact rest on the principle of sufficient reason, which states that nothing can be so unless there is a reason that it is so. This reason is that the actual world (by which he means the total collection of things past, present and future) is better than any other possible worlds and was therefore created by ‘God’.
In defending the principle of sufficient reason, Leibniz runs into serious problems. He believes that in every true proposition, the concept of the predicate is contained in that of the subject. (This holds even for propositions like ‘Caesar crossed the Rubicon’: Leibniz thinks anyone who dids not cross the Rubicon, would not have been Caesar). And this containment relationship! Which is eternal and unalterable even by God ~?! Guarantees that every truth has a sufficient reason. If truths consists in concept containment, however, then it seems that all truths are analytic and hence necessary, and if they are all necessary, surely they are all truths of reason. Leibnitz responds that not every truth can be reduced to an identity in a finite number of steps, in some instances revealing the connection between subject and predicate concepts would requite an infinite analysis. But while this may entail that we cannot prove such propositions as deductively manifested, it does not appear to show that the proposition could have been false. Intuitively, it seems a better ground for supposing that it is necessary truth of a special sort. A related question arises from the idea that truths of fact depend on God’s decision to create he best of all possible worlds: If it is part of the concept of this world that it is best, now could its existence be other than necessary? Leibniz answers that its existence is only hypothetically necessary, i.e., it follows from God’s decision to create this world, but God had the power to decide otherwise. Yet God is necessarily good and non-deceiving, so how could he have decided to do anything else? Leibniz says much more about these masters, but it is not clear whether he offers any satisfactory solutions.
Finally, Kripke (1972) and Plantinga (1974) argues that some contingent truths are knowable by deductive reasoning. Similar problems face the suggestion that necessary truths are the ones we know with the fairest of certainties: We lack a criterion for certainty, there are necessary truths we do not know, and (barring dubious arguments for scepticism) it is reasonable to suppose that we know some contingent truths with certainty.
Issues surrounding certainty are inexorably connected with those concerning scepticism. For many sceptics have traditionally held that knowledge requires certainty, and, of course, the claim that certain knowledge is not possible. in part , in order to avoid scepticism, the anti-sceptics have generally held that knowledge does not require certainty (Lehrer, 1974: Dewey, 1960). A few ant-sceptics, that knowledge does require certain but, against the sceptic that certainty is possible. The task is to provide a characterization of certainty which wou b acceptable to both sceptic and anti-sceptics. For such an agreement is a pre-condition of an interesting debate between them.
It seems clear that certainty is a property that an be ascribed to either a person or belief. We can say that a person,’S’, is certain - belief. We can say that a person ‘S’, is certain, or we can say that a proposition ‘p’, is certain, or we can be connected=by saying that ‘the two use can be connected by saying that ‘S’ has the right to be certain just in case ‘p is sufficiently warranted (Ayer, 1956). Following this lead, most philosophers who have take the second sense, the sense in which a proposition is said to be certain, as the important one to be investigated by epistemology, an exception is Unger who defends scepticism by arguing that psychological certainty is not possible (Ungr, 1975).
In defining certainty, is crucial to note that the term has both an absolute and relative sense, very roughly, one can say that a proposition is absolutely certain just in case there is no proposition more warranted than there is no proposition more warranted that it (Chisholm, 1977), But we also commonly say that one proposition is more certain than say that one proposition is more certain than another, implying that the second one, though less certain, is still certain.
Now some philosophers, have argued that the absolute sense is the only sense, and that the relative sense is only apparent. Even if those arguments are convincing, what remains clear is that here is an absolute sense and it is that some sense which is crucial to the issues surrounding scepticism,
Let us suppose that the interesting question is this. What makes a belief or proposition absolutely certain?
There are several ways of approaching an answer to that question, some like Russell, will take a belief to be certain just in case there is no logical possibility that our belief is false (Russell, 1922). On this definition proposition about physical objects (objects occupying space) cannot be certain, however, that characterization of certainty should be rejected precisely because it makes the question of the existence of absolute certain empirical propositions uninteresting. For it concedes to the sceptic the impassivity of certainty bout physical objects too easily, thus, this approach would not be acceptable to the anti-sceptics.
Other philosophers have suggested that the role hast a belef plays within our set of actual beliefs makes a belief certain, for example, Wittgenstein has suggested that a belief is certain just in case it can be appealed to in order to justify other beliefs, as other beliefs however, promote without some needs of justification itself but appealed to in order to justify other beliefs but stands in no need of justification itself. Thus, the question of the existence of beliefs has are certain can be answered by merely inspecting our practices to determine that there are beliefs which play the specific role. This approach would not be acceptable to the sceptics. For it, too, makes the question of the existence of absolutely certain belief uninteresting. The issue is not whether there are beliefs which play such a role, but whether the are any beliefs which should play that role. Perhaps our practices cannot be defended.
Off the cuff, he characterization of absolute certainty given that a belief ‘p’, is certain just in case there is no belief which is more warranted than ‘p’. Although it does delineate a necessary condition of absolute certainty an is preferable to the Wittgenstein approach , as it does not capture the full sense of ‘absolute certainty’. The sceptic would argue that it is not strong enough. For, according to this rough characterization, a belief could be absolutely certain and yet there could be good grounds for doubting - just as long as there were equally good ground for doubting every proposition that was equally warranted, in addition, to say that a belie isd certain is to say, in part, that we have a guarantee of its truth, there is no such guarantee provided by this rough characterisation.
A Cartesian characterization certainty seem more promising. Roughly, this approach is that a proposition ‘p’, is certain for ‘S’ just in case ‘S’ is warranted in believing that ‘p’ an there ae absolutely no grounds whatsoever or doubting it. Now one, could characterize those grounds in a variety of ways, for example, a ground ‘g’ for making ‘p’ doubtful for ‘S’ could be such that (a) ‘S’ is not warranted in denying ‘g’ and:
(B1) If ‘g’ is added to ‘S’s’ beliefs, the negation of ‘p’ is warranted: Or.
(B2) If ‘g’ is added to ‘S’s’ beliefs, ‘p’ is no longer warranted: Or,
(B3) If ‘g’ is added to ‘S’s’ beliefs, ‘p’ becomes less warranted (even if only slightly so.)
Although there is a guarantee of sorts of ‘p’s’ truth contained in (b1) and (b2), those notions of grounds for doubt do not seem to capture a basic feature in absolute certainty delineated in the rough account given as such, that for a proposition ‘p’, could be immune to grounds for doubt ‘g’ in those two senses and yet another preposition would be ;more certain’ if there were no grounds for doubt like those specified in (b3), so, only (b3) can succeed on providing part of the required guarantee of ‘p’s’ truth.
An account like that contained in (b3) can provide only part of the guarantee because it is only a subjective guarantee of ‘p’s’ truth, ‘S’s; belief system would contain adequate grounds for assuring’S’ and ’p’ is true because ‘S’s’ belief system would warrant the denial of ever preposition that would lower the warrant of ‘p’. But ‘S’s’ belief system might contain false beliefs and still be immune to doubt in this sense. Indeed, ‘p’ itself could be certain and false in this subjective sense.
An objective guarantee is needed as well. We can capture such objective immunity to doubt by requiring roughly that there be no true proposition such that if it is added to ‘S’s’ beliefs, the result is reduction in the warrant for ’p’ (even if only slightly). That is, there will be true propositions which if added to ‘S’s’ beliefs result in lowering the warrant of ‘p’ because the y render evident some false proposition which actually reduces the warrant of ‘p’. It is debatable whether leading defeaters provide genius grounds for doubt. Thus, we can sa that a belief that ‘p’ is absolutely certain just in case it is subjectively and objectively immune to doubt. In other words a proposition ‘p’ is absolutely certain for ‘S’ if and only if (1) ‘p’ is warranted for ‘S’ and (2) ‘S’ is warranted in denying every proposition ‘g, such that if’g’ is added to ‘S’s’ beliefs, the warrant for ‘p’ is reduced and (3) there is no true preposition, ‘d’, sh that if ‘d’ is added to ‘S’s’ beliefs the warrant for ‘p’ is reduced.
This is an amount of absolute certainty which captures what is demanded by the sceptic, it is indubitable and guarantee both objectively and objectively to be true. In addition, such a characterization of certainty does not automatically lead to scepticism. Thus, this is an account of certainty that satisfies the task at hand, namely to find an account of certainty that provides the precondition for dialogue, and, of course, alongside with a complete set for its dialectic awareness, if only between the sceptic and anti-sceptic.
Leibniz defined a necessary truth as one whose opposite implies a contradiction. Every such proposition, he held, is either an explicit identity, i.e., of the form ‘A is A’, ‘AB is B’, etc. or is reducible to an identity by successively substituting equivalent terms. (thus, 3 above might be so reduced by substituting ‘unmarried man’; for ‘bachelor’.) This has several advantages over the ideas of the previous paragraph. First, it explicated the notion of necessity and possibility and seems to provide a criterion we can apply. Second, because explicit identities are self-evident a deductive propositions, the theory implies that all necessary truths are knowable deductively, but it does not entail that wee actually know all of them, nor does it define ‘knowable’ in a circular way. Third, it implies that necessary truths are knowable with certainty, but does not preclude our having certain knowledge of contingent truths by means other than a reduction.
Leibniz and others have thought of truths as a property of propositions, where the latter are conceived as things that may be expressed by, but are distinct from, linguistic items like statements. On another approach, truth is a property of linguistic entities, and the basis of necessary truth in convention. Thus A.J. Ayer, for example,. Argued that the only necessary truths are analytic statements and that the latter rest entirely on our commitment to use words in certain ways.
The slogan ‘the meaning of a statement is its method of verification’ expresses the empirical verification’s theory of meaning. It is more than the general criterion of meaningfulness if and only if it is empirically verifiable. If says in addition what the meaning of a sentence is: All those observations would confirm or disconfirmed the sentence. Sentences that would be verified or falsified by all the same observations are empirically equivalent or have the same meaning. A sentence is said to be cognitively meaningful if and only if it can be verified or falsified in experience. This is not meant to require that the sentence be conclusively verified or falsified, since universal scientific laws or hypotheses (which are supposed to pass the test) are not logically deducible from any amount of actually observed evidence.
When one predicate’s necessary truth of a preposition one speaks of modality de dicto. For one ascribes the modal property, necessary truth, to a dictum, namely, whatever proposition is taken as necessary. A venerable tradition, however, distinguishes this from necessary de re, wherein one predicates necessary or essential possession of some property to an on object. For example, the statement ‘4 is necessarily greater than 2' might be used to predicate of the object, 4, the property, being necessarily greater than 2. That objects have some of their properties necessarily, or essentially, and others only contingently, or accidentally, are a main part of the doctrine called, essentialism’. Thus, an essentialist might say that Socrates had the property of being bald accidentally, but that of being self-identical, or perhaps of being human, essentially. Although essentialism has been vigorously attacked in recent years, most particularly by Quine, it also has able contemporary proponents, such as Plantinga.
Modal necessity as seen by many philosophers whom have traditionally held that every proposition has a modal status as well as a truth value. Every proposition is either necessary or contingent as well as either true or false. The issue of knowledge of the modal status of propositions has received much attention because of its intimate relationship to the issue of deductive reasoning. For example, no propositions of the theoretic content that all knowledge of necessary propositions is deductively knowledgeable. Others reject this claim by citing Kripke’s (1980) alleged cases of necessary theoretical propositions. Such contentions are often inconclusive, for they fail to take into account the following tripartite distinction: ‘S’ knows the general modal status of ‘p’ just in case ‘S’ knows that ‘p’ is a necessary proposition or ‘S’ knows the truth that ‘p’ is a contingent proposition. ‘S’ knows the truth value of ‘p’ just in case ‘S’ knows that ‘p’ is true or ‘S’ knows that ‘p’ is false. ‘S’ knows the specific modal status of ‘p’ just in case ‘S’ knows that ‘p’ is necessarily true or ‘S’ knows that ‘p’ is necessarily false or ‘S’ knows that ‘p’ is contingently true or ‘S’ knows that ‘p’ is contingently false. It does not follow from the fact that knowledge of the general modal status of a proposition is a deductively reasoned distinctive modal status is also given to theoretical principles. Nor des it follow from the fact that knowledge of a specific modal status of a proposition is theoretically given as to the knowledge of its general modal status that also is deductive.
The certainties involving reason and a truth of fact are much in distinction by associative measures given through Leibniz, who declares that there are only two kinds of truths-truths of reason and truths of fact. The former are all either explicit identities, i.e., of the form ‘A is A’, ‘AB is B’, etc., or they are reducible to this form by successively substituting equivalent terms. Leibniz dubs them ‘truths of reason’ because the explicit identities are self-evident theoretical truth, whereas the rest can be converted to such by purely rational operations. Because their denial involves a demonstrable contradiction, Leibniz also says that truths of reason ‘rest on the principle of contraction, or identity’ and that they are necessary propositions, which are true of all possible worlds. Some examples are that All bachelors are unmarried’: The first is already of the form ‘AB is B’ and the latter can be reduced to this form by substituting ‘unmarried man’ for ‘bachelor’. Other examples, or so Leibniz believes, are ‘God exists’ and the truth of logic, arithmetic and geometry.
Truths of fact, on the other hand, cannot be reduced to an identity and our only way of knowing hem os a theoretical manifestations, or by reference to the fact of the empirical world. Likewise, since their denial does not involve as contradiction, their truth is merely contingent: They could have been otherwise and hold of the actual world, but not of every possible one. Some examples are ‘Caesar crossed the Rubicon’ and ‘Leibniz was born in Leipzig’, as well as propositions expressing correct scientific generalizations. In Leibniz’s view, truths of fact rest on the principle of sufficient reason, which states that nothing can be so unless thee is a reason that it is so. This reason is that the actual world (by which he means the total collection of things past, present and future) is better than any other possible world and was therefore created by God.
In defending the principle of sufficient reason, Leibniz runs into serious problems. He believes that in every true proposition, the concept of the predicate is contained in that of the subject. (This hols even for propositions like ‘Caesar crossed the Rubicon’: Leibniz thinks anyone who did not cross the Rubicon would not have been Caesar) And this containment relationship-that is eternal and unalterable even by God-guarantees that every truth has a sufficient reason. If truth consists in concept containment, however, then it seems that all truths are analytic and hence necessary, and if they are all necessary, surely they are all truths of reason. Leibniz responds that not evert truth can be reduced to an identity in a finite number of steps: In some instances revealing the connection between subject and predicate concepts would require an infinite analysis. But while this may entail that we cannot prove such propositions as deductively probable, it does not appear to show that the proposition could have been false. Intuitively, it seems a better ground for supposing that it is a necessary truth of a special sort. A related question arises from the idea that truths of fact depend on God’s decision to create the best world, if it is part of the concept of this world that it is best, how could its existence be other than necessary? Leibniz answers that its existence is only hypothetically necessary, i.e., it follows from God’s decision to create this world, but God is necessarily good, so how could he have decided to do anything else? Leibniz says much more about the matters, but it is not clear whether he offers any satisfactory solutions.
The modality of a proposition is the way in which it is true or false. The most important division is between propositions true of necessity, and those true asa things are: Necessary as opposed to contingent propositions. Other qualifiers sometimes called ‘modal’ include the tense indicators ‘It will be the case that p’ or It was the case that p’, and there are affinities between the ‘deontic indicators’, as, ;it ought to be the case that p’ or ‘it is permissible that p’, and the logical modalities as a logic that study the notions of necessity and possibility. Modal logic was of a great importance historically, particularly in the light of various doctrines concerning the necessary properties of the deity, but was not a central topic of modern logic in its golden period at the beginning of the 20th century. It was, however, revived by C. I. Lewis, by adding to a propositional or predicate calculus two operators, □ and ◊ (sometimes written N and M), meaning necessarily and possibly, respectively. These like p ➞ ◊ p and □ p ➞ p will be wanted. Controversial theses include □ p ➞ □□ p (if a proposition is necessary, it is necessarily necessary, characteristic of the system known as S4) and ◊ p ➞ □ ◊ p (if a proposition is possible, it is necessarily possible, characteristic of the system known as S5). The classical ‘modal theory’ for modal logic, due to Kripke and the Swedish logician Stig Kanger, involves valuing propositions not as true or false ‘simpliciers’, but as true or false art possible worlds, with necessity then corresponding to truth in all worlds, and possibly to truth in some world.
The doctrine advocated by David Lewis, which different ‘possible worlds’ are to be thought of as existing exactly as this one does. Thinking in terms of possibilities is thinking of real worlds where things are different, this view has been charged with misrepresenting it as some insurmountably unseeing to why it is good to save the child from drowning, since there is still a possible world in which she (or her counterpart) drowned, and from the standpoint of the universe it should make no difference that world is actual. Critics asio charge either that the notion fails to fit with a coherent theory of how we know about possible worlds, or with a coherent theory about possible worlds, or with a coherent theory of why we are interested in them, but Lewis denies that any other way of interpreting modal statements is tenable.
Thus and so, the ‘standard analysis’ of propositional knowledge, suggested by Plato and Kant among others, implies that if one has a justified true belief that ‘p’, then one knows that ‘p’. The belief condition ‘p’ believes that ‘p’, the truth condition requires that any known proposition be true. And the justification condition requires that any known proposition be adequately justified, warranted or evidentially supported. Plato appears to be considering the tripartite definition in the “Theaetetus” (201c-202d), and to be endorsing its jointly sufficient conditions for knowledge in the “Meno” (97e-98a). This definition has come to be called ‘the standard analysis’ of knowledge, and has received a serious challenge from Edmund Gettier’s counterexamples in 1963. Gettier published two counterexamples to this implication of the standard analysis. In essence, they are:
(1) Smith and Jones have applied for the same job. Smith is justified in believing that (a) Jones will get the job, and that (b) Jones has ten coins in his pocket. On the basis of (a) and (b) Smith infers, and thus is justified in believing, that © the person who will get the job has ten coins in his pocket. At it turns out, Smith himself will get the job, and he also happens to have ten coins in his pocket. So, although Smith is justified in believing the true proposition ©, Smith does not know ©.
(2) Smith is justified in believing the false proposition that (a) Smith owns a Ford. On the basis of (a) Smith infers, and thus is justified in believing, that (b) either Jones owns a Ford or Brown is in Barcelona. As it turns out, Brown or in Barcelona, and so (b) is true. So although Smith is justified in believing the true proposition (b). Smith does not know (b).
Gettier’s counterexamples are thus cases where one has justified true belief that ‘p’, but lacks knowledge that ‘p’. The Gettier problem is the problem of finding a modification of, or an alterative to, the standard justified-true-belief analysis of knowledge that avoids counterexamples like Gettier’s. Some philosophers have suggested that Gettier style counterexamples are defective owing to their reliance on the false principle that false propositions can justify one’s belief in other propositions. But there are examples much like Gettier’s that do not depend on this allegedly false principle. Here is one example inspired by Keith and Richard Feldman:
(3) Suppose Smith knows the following proposition, ‘m’: Jones, whom Smith has always found to be reliable and whom Smith, has no reason to distrust now, has told Smith, his office-mate, that ‘p’: He, Jones owns a Ford. Suppose also that Jones has told Smith that ‘p’ only because of a state of hypnosis Jones is in, and that ‘p’ is true only because, unknown to himself, Jones has won a Ford in a lottery since entering the state of hypnosis. And suppose further that Smith deduces from ‘m’ its existential generalization, ‘q’: There is someone, whom Smith has always found to be reliable and whom Smith has no reason to distrust now, who has told Smith, his office-mate, that he owns a Ford. Smith, then, knows that ‘q’, since he has correctly deduced ‘q’ from ‘m’, which he also knows. But suppose also that on the basis of his knowledge that ‘q’. Smith believes that ‘r’: Someone in the office owns a Ford. Under these conditions, Smith has justified true belief that ‘r’, knows his evidence for ‘r’, but does not know that ‘r’.
Gettier-style examples of this sort have proven especially difficult for attempts to analyse the concept of propositional knowledge. The history of attempted solutions to the Gettier problem is complex and open-ended. It has not produced consensus on any solution. Many philosophers hold, in light of Gettier-style examples, that propositional knowledge requires a fourth condition, beyond the justification, truth and belief conditions. Although no particular fourth condition enjoys widespread endorsement, there are some prominent general proposals in circulation. One sort of proposed modification, the so-called ‘defeasibility analysis’, requires that the justification appropriate to knowledge be ‘undefeated’ in the general sense that some appropriate subjunctive conditional concerning genuine defeaters of justification be true of that justification. One straightforward defeasibility fourth condition, for instance, requires of Smith’s knowing that ‘p’ that there be no true proposition ‘q’, such that if ‘q’ became justified for Smith, ‘p’ would no longer be justified for Smith (Pappas and Swain, 1978). A different prominent modification requires that the actual justification for a true belief qualifying as knowledge not depend I a specified way on any falsehood (Armstrong, 1973). The details proposed to elaborate such approaches have met with considerable controversy.
The fourth condition of evidential truth-sustenance may be a speculative solution to the Gettier problem. More specifically, for a person, ‘S’, to have knowledge that ‘p’ on justifying evidence ‘e’, ‘e’ must be truth-sustained in this sense for every true proposition ‘t’ that, when conjoined with ‘e’, undermines S’s justification for ‘p’ on ‘e’, there is a true proposition, ‘t’, that, when conjoined with ‘e’ & ‘t’, restores the justification of ‘p’ for ‘S’ in a way that ‘S’ is actually justified in believing that ‘p’. The gist of this resolving evolution, put roughly, is that propositional knowledge requires justified true belief that is sustained by the collective totality of truths. Herein, is to argue in Knowledge and Evidence, that Gettier-style examples as (1)-(3), but various others as well.
Three features that proposed this solution merit emphasis. First, it avoids a subjunctive conditional in its fourth condition, and so escapes some difficult problems facing the use of such a conditional in an analysis of knowledge. Second, it allows for non-deductive justifying evidence as a component of propositional knowledge. An adequacy condition on an analysis of knowledge is that it does not restrict justifying evidence to relations of deductive support. Third, its proposed solution is sufficiently flexible to handle cases describable as follows:
(4) Smith has a justified true belief that ‘p’, but there is a true proposition, ‘t’, which undermines Smith’s justification for ‘p’ when conjoined with it, and which is such that it is either physically or humanly impossible for Smith to be justified in believing that ‘t’.
Examples represented by (4) suggest that we should countenance varying strengths in notions of propositional knowledge. These strengths are determined by accessibility qualifications on the set of relevant knowledge-precluding underminers. A very demanding concept of knowledge assumes that it need only be logically possible for a Knower to believe a knowledge-precluding underminer. Fewer demanding concepts assume that it must be physically or humanly possible for a Knower to believe knowledge-precluding underminers. But even such less demanding concepts of knowledge need to rely on a notion of truth-sustained evidence if they are to survive a threatening range of Gettier-style examples. Given to some resolution that it needs be that the forth condition for a notion of knowledge is not a function simply of the evidence a Knower actually possesses.
The higher controversial aftermath of Gettier’s original counterexamples has left some philosophers doubted of the real philosophical significance of the Gettier problem. Such doubt, however, seems misplaced. One fundamental branch of epistemology seeks understanding of the nature of propositional knowledge. And our understanding exactly what prepositional knowledge is essentially involves having a Gettier-resistant analysis of such knowledge. If our analysis is not Gettier-resistant, we will lack an exact understanding of what propositional knowledge is. It is epistemologically important, therefore, to have a defensible solution to the Gettier problem, however, demanding such a solution is.
Propositional knowledge (PK) is the type of knowing whose instance are labelled by means of a phrase expressing some proposition, e.g., in English a phrase of the form ‘that h’, where some complete declarative sentence is instantial for ‘h’.
Theories of ‘PK’ differ over whether the proposition that ‘h’ is involved in a more intimate fashion, such as serving as a way of picking out a proposition attitude required for knowing, e.g., believing that ‘h’, accepting that ‘h’ or being sure that ‘h’. For instance, the tripartite analysis or standard analysis, treats ‘PK’ as consisting in having a justified, true belief that ‘h’ , the belief condition requires that anyone who knows that ‘h’ believes that ‘h’, the truth condition requires that any known proposition be true, in contrast, some regarded theories do so consider and treat ‘PK’ as the possession of specific abilities, capabilities, or powers, and that view the proposition that ‘h’ as needed to be expressed only in order to label a specific instance of ‘PK’.
Although most theories of Propositional knowledge (PK) purport to analyse it, philosophers disagree about the goal of a philosophical analysis. Theories of ‘PK’ may differ over whether they aim to cover all species of ‘PK’ and, if they do not have this goal, over whether they aim to reveal any unifying link between the species that they investigate, e.g., empirical knowledge, and other species of knowing.
Very many accounts of ‘PK’ have been inspired by the quest to add a fourth condition to the tripartite analysis so as to avoid Gettier-type counterexamples to it, whereby a fourth condition of evidential truth-sustenance for every true proposition when conjoined with a regaining justification, which may require the justified true belief that is sustained by the collective totality of truths that an adequacy condition of propositional knowledge not restrict justified evidences in relation of deductive support, such that we should countenance varying strengths in notions of propositional knowledge. Restoratively, these strengths are determined by accessibility qualifications on the set of relevant knowledge-precluding underminers. A very demanding concept of knowledge assumes that it need only be logically possible for a Knower to believe a knowledge-precluding undeterminers, and less demanding concepts that it must physically or humanly possible for a Knower to believe knowledge-precluding undeterminers. But even such demanding concepts of knowledge need to rely on a notion of truth-sustaining evidence if they are to survive a threatening range of Gettier-style examples. As the needed fourth condition for a notion of knowledge is not a function simply of the evidence a Knower actually possesses. One fundamental source of epistemology seeks understanding of the nature of propositional knowledge, and our understanding exactly what propositional knowledge is essentially involves our having a Gettier-resistant analysis of such knowledge. If our analysis is not Gettier-resistant, we will lack an exact understanding of what propositional knowledge is. It is epistemologically important, therefore, to have a defensible solution to the Gettier problem, however, demanding such a solution is. And by the resulting need to deal with other counterexamples provoked by these new analyses.
Keith Lehrer (1965) originated a Gettier-type example that has been a fertile source of important variants. It is the case of Mr Notgot, who is in one’s office and has provided some evidence, ‘e’, in response to all of which one forms a justified belief that Mr. Notgot is in the office and owns a Ford, thanks to which one arrives at the justified belief that ‘h': ‘Someone in the office owns a Ford’. In the example, ‘e’ consists of such things as Mr. Notgot’s presently showing one a certificate of Ford ownership while claiming to own a Ford and having been reliable in the past. Yet, Mr Notgot has just been shamming, and the only reason that it is true that ‘h1' is because, unbeknown to oneself, a different person in the office owns a convertible Ford.
Variants on this example continue to challenge efforts to analyse species of ‘PK’. For instance, Alan Goldman (1988) has proposed that when one has empirical knowledge that ‘h’, when the state of affairs (call it h*) expressed by the proposition that ‘h’ figures prominently in an explanation of the occurrence of one’s believing that ‘h’, where explanation is taken to involve one of a variety of probability relations concerning ‘h*’ , and the belief state. But this account runs foul of a variant on the Notgot case akin to one that Lehrer (1979) has described. In Lehrer’s variant, Mr Notgot has manifested a compulsion to trick people into justified believing truths yet falling short of knowledge by means of concocting Gettierized evidence for those truths. It we make the trickster’s neuroses highly specific ti the type of information contained in the proposition that ‘h’, we obtain a variant satisfying Goldman’s requirement That the occurrences of ‘h*’ significantly raises the probability of one’s believing that ‘h’. (Lehrer himself (1990, pp. 103-4) has criticized Goldman by questioning whether, when one has ordinary perceptual knowledge that abn object is present, the presence of the object is what explains one’s believing it to be present.)
In grappling with Gettier-type examples, some analyses proscribe specific relations between falsehoods and the evidence or grounds that justify one’s believing. A simple restriction of this type requires that one’s reasoning to the belief that ‘h’ does not crucially depend upon any false lemma (such as the false proposition that Mr Notgot is in the office and owns a Ford). However, Gettier-type examples have been constructed where one does not reason through and false belief, e.g., a variant of the Notgot case where one arrives at belief that ‘h’, by basing it upon a true existential generalization of one’s evidence: ‘There is someone in the office who has provided evidence e’, in response to similar cases, Sosa (1991) has proposed that for ‘PK’ the ‘basis’ for the justification of one’s belief that ‘h’ must not involve one’s being justified in believing or in ‘presupposing’ any falsehood, even if one’s reasoning to the belief does not employ that falsehood as a lemma. Alternatively, Roderick Chisholm (1989) requires that if there is something that makes the proposition that ‘h’ evident for one and yet makes something else that is false evident for one, then the proposition that ‘h’ is implied by a conjunction of propositions, each of which is evident for one and is such that something that makes it evident for one makes no falsehood evident for one. Other types of analyses are concerned with the role of falsehoods within the justification of the proposition that ‘h’ (Versus the justification of one’s believing that ‘h’). Such a theory may require that one’s evidence bearing on this justification not already contain falsehoods. Or it may require that no falsehoods are involved at specific places in a special explanatory structure relating to the justification of the proposition that ‘h’ (Shope, 1983.).
A frequently pursued line of research concerning a fourth condition of knowing seeks what is called a ‘defeasibility’ analysis of ‘PK’. Early versions characterized defeasibility by means of subjunctive conditionals of the form, ‘If ‘A’ were the case then ‘B’ would be the case’. But more recently the label has been applied to conditions about evidential or justificational relations that are not themselves characterized in terms of conditionals. Early versions of defeasibility theories advanced conditionals where ‘A’ is a hypothetical situation concerning one’s acquisition of a specified sort of epistemic status for specified propositions, e.g., one’s acquiring justified belief in some further evidence or truths, and ‘B’; concerned, for instance, the continued justified status of the proposition that ‘h’ or of one’s believing that ‘h’.
A unifying thread connecting the conditional and non-conditional approaches to defeasibility may lie in the following facts: (1) What is a reason for being in a propositional attitude is in part a consideration , instances of the thought of which have the power to affect relevant processes of propositional attitude formation? : (2) Philosophers have often hoped to analyse power ascriptions by means of conditional statements: And (3) Arguments portraying evidential or justificational relations are abstractions from those processes of propositional attitude maintenance and formation that manifest rationality. So even when some circumstance, ‘R’, is a reason for believing or accepting that ‘h’, another circumstance, ‘K’ may present an occasion from being present for a rational manifestation of the relevant power of the thought of ‘R’ and it will not be a good argument to base a conclusion that ‘h’ on the premiss that ‘R’ and ‘K’ obtain. Whether ‘K’ does play this interfering, ‘defeating’. Role will depend upon the total relevant situation.
Accordingly, one of the most sophisticated defeasibility accounts, which has been proposed by John Pollock (1986), requires that in order to know that ‘h’, one must believe that ‘h’ on the basis of an argument whose force is not defeated in the above way, given the total set of circumstances described by all truths. More specifically, Pollock defines defeat as a situation where (1) one believes that ‘p’ and it is logically possible for one to become justified in believing that ‘h’ by believing that ’p’, and (2) on e actually has a further set of beliefs, ‘S’ logically has a further set of beliefs, ‘S’, logically consistent with the proposition that ‘h’, such that it is not logically possible for one to become justified in believing that ‘h’ by believing it ion the basis of holding the set of beliefs that is the union of ‘S’ with the belief that ‘p’ (Pollock, 1986, pp. 36, 38). Furthermore, Pollock requires for ‘PK’ that the rational presupposition in favour of one’s believing that ‘h’ created by one’s believing that ‘p’ is undefeated by the set of all truths, including considerations that one does not actually believe. Pollock offers no definition of what this requirements means. But he may intend roughly the following: There ‘T’ is the set of all true propositions: (I) one believes that ‘p’ and it is logically possible for one to become justified in believing that ‘h’; by believing that ‘p’. And (II) there are logically possible situations in which one becomes justified in believing that ‘h’ on the bass of having the belief that ‘p’ and the beliefs in ‘T’. Thus, in the Notgot example, since ‘T’ includes the proposition that Mr. Notgot does own a sedan Ford, one lack’s knowledge because condition (II) is not satisfied.
But given such an interpretation, Pollock’s account illustrates the fact that defeasibility theories typically have difficulty dealing with introspective knowledge of one’s beliefs. Suppose that some proposition, say that ƒ, is false, but one does not realize this and holds the belief that ƒ. Condition
(II) has no knowledge that h2?: ‘I believe that ƒ’. At least this is so if one’s reason for believing that h2 includes the presence of the very condition of which one is aware, i.e., one’s believing that ƒ. It is incoherent to suppose hat one retains the latter reason, also, believes the truth that not-ƒ. This objection can be avoided, but at the cost of adopting what is a controversial view about introspective knowledge that ‘h’,namely, the view that one’s belief that ‘h’ is in such cases mediated by some mental state intervening between the mental state of which there is introspective knowledge and he belief that ‘h’, so that is mental state is rather than the introspected state that it is included in one’s reason for believing that ‘h’. In order to avoid adopting this controversial view, Paul Moser (1989) gas proposed a disjunctive analysis of ‘PK’, which requires that either one satisfy a defeasibility condition rather than like Pollock’s or else one believes that ‘h’ by introspection. However, Moser leaves obscure exactly why beliefs arrived at by introspections account as knowledge.
Early versions of defeasibility theories had difficulty allowing for the existence of evidence that is ‘merely misleading’, as in the case where one does know that ‘h3: ‘Tom Grabit stole a book from the library’, thanks to having seen him steal it, yet where, unbeknown to oneself, Tom’s mother out of dementia gas testified that Tom was far away from the library at the time of the theft. One’s justifiably believing that she gave the testimony would destroy one’s justification for believing that ‘h3' if added by itself to one’s present evidence.
At least some defeasibility theories cannot deal with the knowledge one has while dying that ‘h4: ‘In this life there is no timer at which I believe that ‘d’, where the proposition that ‘d’ expresses the details regarding some philosophical matter, e.g., the maximum number of blades of grass ever simultaneously growing on the earth. When it just so happens that it is true that ‘d’, defeasibility analyses typically consider the addition to one’s dying thoughts of a belief that ‘d’ in such a way as to improperly rule out actual knowledge that ‘h4'.
A quite different approach to knowledge, and one able to deal with some Gettier-type cases, involves developing some type of causal theory of Propositional knowledge. The interesting thesis that counts as a causal theory of justification (in the meaning of ‘causal theory; intended here) is the that of a belief is justified just in case it was produced by a type of process that is ‘globally’ reliable, that is, its propensity to produce true beliefs-that can be defined (to a god enough approximation) as the proportion of the bailiffs it produces (or would produce where it used as much as opportunity allows) that are true-is sufficiently meaningful-variations of this view have been advanced for both knowledge and justified belief. The first formulation of reliability account of knowing appeared in a note by F.P. Ramsey (1931), who said that a belief was knowledge if it is true, certain can obtain by a reliable process. P. Unger (1968) suggested that “S’ knows that ‘p’ just in case it is not at all accidental that ‘S’ is right about its being the casse that ‘p’. D.M. Armstrong (1973) said that a non-inferential belief qualified as knowledge if the belief has properties that are nominally sufficient for its truth, i.e., guarantee its truth through and by the laws of nature.
Such theories require that one or another specified relation hold that can be characterized by mention of some aspect of cassation concerning one’s belief that ‘h’ (or one’s acceptance of the proposition that ‘h’) and its relation to state of affairs ‘h*’, e.g., h* causes the belief: h* is causally sufficient for the belief h* and the belief have a common cause. Such simple versions of a causal theory are able to deal with the original Notgot case, since it involves no such causal relationship, but cannot explain why there is ignorance in the variants where Notgot and Berent Enç (1984) have pointed out that sometimes one knows of ‘χ’ that is øf thanks to recognizing a feature merely corelated with the presence of øneness without endorsing a causal theory themselves, there suggest that it would need to be elaborated so as to allow that one’s belief that ‘χ’ has ø has been caused by a factor whose correlation with the presence of øneness has caused in oneself, e.g., by evolutionary adaption in one’s ancestors, the disposition that one manifests in acquiring the belief in response to the correlated factor. Not only does this strain the unity of as causal theory by complicating it, but no causal theory without other shortcomings has been able to cover instances of deductively reasoned knowledge.
Causal theories of Propositional knowledge differ over whether they deviate from the tripartite analysis by dropping the requirements that one’s believing (accepting) that ‘h’ be justified. The same variation occurs regarding reliability theories, which present the Knower as reliable concerning the issue of whether or not ‘h’, in the sense that some of one’s cognitive or epistemic states, θ, are such that, given further characteristics of oneself-possibly including relations to factors external to one and which one may not be aware-it is nomologically necessary (or at least probable) that ‘h’. In some versions, the reliability is required to be ‘global’ in as far as it must concern a nomologically (probabilistic) relationship) relationship of states of type θ to the acquisition of true beliefs about a wider range of issues than merely whether or not ‘h’. There is also controversy about how to delineate the limits of what constitutes a type of relevant personal state or characteristic. (For example, in a case where Mr Notgot has not been shamming and one does know thereby that someone in the office owns a Ford, such as a way of forming beliefs about the properties of persons spatially close to one, or instead something narrower, such as a way of forming beliefs about Ford owners in offices partly upon the basis of their relevant testimony?)
One important variety of reliability theory is a conclusive reason account, which includes a requirement that one’s reasons for believing that ‘h’ be such that in one’s circumstances, if h* were not to occur then, e.g., one would not have the reasons one does for believing that ‘h’, or, e.g., one would not believe that ‘h’. Roughly, the latter is demanded by theories that treat a Knower as ‘tracking the truth’, theories that include the further demand that is roughly, if it were the case, that ‘h’, then one would believe that ‘h’. A version of the tracking theory has been defended by Robert Nozick (1981), who adds that if what he calls a ‘method’ has been used to arrive at the belief that ‘h’, then the antecedent clauses of the two conditionals that characterize tracking will need to include the hypothesis that one would employ the very same method.
But unless more conditions are added to Nozick’s analysis, it will be too weak to explain why one lack’s knowledge in a version of the last variant of the tricky Mr Notgot case described above, where we add the following details: (a) Mr Notgot’s compulsion is not easily changed, (b) while in the office, Mr Notgot has no other easy trick of the relevant type to play on one, and © one arrives at one’s belief that ‘h’, not by reasoning through a false belief ut by basing belief that ‘h’, upon a true existential generalization of one’s evidence.
Nozick’s analysis is in addition too strong to permit anyone ever to know that ‘h’: ‘Some of my beliefs about beliefs might be otherwise, e.g., I might have rejected on of them’. If I know that ‘h5' then satisfaction of the antecedent of one of Nozick’s conditionals would involve its being false that ‘h5', thereby thwarting satisfaction of the consequent’s requirement that I not then believe that ‘h5'. For the belief that ‘h5' is itself one of my beliefs about beliefs (Shope, 1984).
Some philosophers think that the category of knowing for which true. Justified believing (accepting) is a requirement constituting only a species of Propositional knowledge, construed as an even broader category. They have proposed various examples of ‘PK’ that do not satisfy the belief and/ort justification conditions of the tripartite analysis. Such cases are often recognized by analyses of Propositional knowledge in terms of powers, capacities, or abilities. For instance, Alan R. White (1982) treats ‘PK’ as merely the ability to provide a correct answer to possible questions, however, White may be equating ‘producing’ knowledge in the sense of producing ‘the correct answer to a possible question’ with ‘displaying’ knowledge in the sense of manifesting knowledge. (White, 1982). The latter can be done even by very young children and some non-human animals independently of their being asked questions, understanding questions, or recognizing answers to questions. Indeed, an example that has been proposed as an instance of knowing that ‘h’ without believing or accepting that ‘h’ can be modified so as to illustrate this point. Two examples concerns an imaginary person who has no special training or information about horses or racing, but who in an experiment persistently and correctly picks the winners of upcoming horseraces. If the example is modified so that the hypothetical ‘seer’ never picks winners but only muses over whether those horses wight win, or only reports those horses winning, this behaviour should be as much of a candidate for the person’s manifesting knowledge that the horse in question will win as would be the behaviour of picking it as a winner.
These considerations expose limitations in Edward Craig’s analysis (1990) of the concept of knowing of a person’s being a satisfactory informant in relation to an inquirer who wants to find out whether or not ‘h’. Craig realizes that counterexamples to his analysis appear to be constituted by Knower who are too recalcitrant to inform the inquirer, or too incapacitate to inform, or too discredited to be worth considering (as with the boy who cried ‘Wolf’). Craig admits that this might make preferable some alternative view of knowledge as a different state that helps to explain the presence of the state of being a suitable informant when the latter does obtain. Such the alternate, which offers a recursive definition that concerns one’s having the power to proceed in a way representing the state of affairs, causally involved in one’s proceeding in this way. When combined with a suitable analysis of representing, this theory of propositional knowledge can be unified with a structurally similar analysis of knowing how to do something.
Knowledge and belief, according to most epistemologists, knowledge entails belief, so that I cannot know that such and such is the case unless I believe that such and such is the case. Others think this entailment thesis can be rendered more accurately if we substitute for belief some closely related attitude. For instance, several philosophers would prefer to say that knowledge entail psychological certainties (Prichard, 1950 and Ayer, 1956) or conviction (Lehrer, 1974) or acceptance (Lehrer, 1989). None the less, there are arguments against all versions of the thesis that knowledge requires having a belief-like attitude toward the known. These arguments are given by philosophers who think that knowledge and belief (or a facsimile) are mutually incompatible (the incomparability thesis), or by ones who say that knowledge does not entail belief, or vice versa, so that each may exist without the other, but the two may also coexist (the separability thesis).
The incompatibility thesis is sometimes traced to Plato ©. 429-347 BC) in view of his claim that knowledge is infallible while belief or opinion is fallible (“Republic” 476-9). But this claim would not support the thesis. Belief might be a component of an infallible form of knowledge in spite of the fallibility of belief. Perhaps, knowledge involves some factor that compensates for the fallibility of belief.
A. Duncan-Jones (1939: Also Vendler, 1978) cite linguistic evidence to back up the incompatibility thesis. He notes that people often say ‘I do not believe she is guilty. I know she is’ and the like, which suggest that belief rule out knowledge. However, as Lehrer (1974) indicates, the above exclamation is only a more emphatic way of saying ‘I do not just believe she is guilty, I know she is’ where ‘just’ makes it especially clear that the speaker is signalling that she has something more salient than mere belief, not that she has something inconsistent with belief, namely knowledge. Compare: ‘You do not hurt him, you killed him’.
H.A. Prichard (1966) offers a defence of the incompatibility thesis that hinges on the equation of knowledge with certainty (both infallibility and psychological certitude) and the assumption that when we believe in the truth of a claim we are not certain about its truth. Given that belief always involves uncertainty while knowledge never dies, believing something rules out the possibility of knowing it. Unfortunately, however, Prichard gives ‘us’ no goods reason to grant that states of belief are never ones involving confidence. Conscious beliefs clearly involve some level of confidence, to suggest that we cease to believe things about which we are completely confident is bizarre.
A.D. Woozley (1953) defends a version of the separability thesis. Woozley’s version, which deals with psychological certainty rather than belief per se, is that knowledge can exist in the absence of confidence about the item known, although might also be accompanied by confidence as well. Woozley remarks that the test of whether I know something is ‘what I can do, where what I can do may include answering questions’. On the basis of this remark he suggests that even when people are unsure of the truth of a claim, they might know that the claim is true. We unhesitatingly attribute knowledge to people who give correct responses on examinations even if those people show no confidence in their answers. Woozley acknowledges, however, that it would be odd for those who lack confidence to claim knowledge. It would be peculiar to say, ‘I am unsure whether my answer is true: Still, I know it is correct’. But this tension Woozley explains using a distinction between conditions under which we are justified in making a claim (such as a claim to know something), and conditions under which the claim we make is true. While ‘I know such and such’ might be true even if I am unsure whether such and such holds, nonetheless it would be inappropriate for me to claim that I know that such and such unless I were sure of the truth of my claim.
Colin Radford (1966) extends Woozley’s defence of the separability thesis. In Radford’s view, not only is knowledge compatible with the lack of certainty, it is also compatible with a complete lack of belief. He argues by example. In one example, Jean has forgotten that he learned some English history year’s priori and yet he is able to give several correct responses to questions such as ‘When did the Battle of Hastings occur’? Since he forgot that he took history, he considers the correct response to be no more than guesses. Thus, when he says that the Battle of Hastings took place in 1066 he would deny having the belief that the Battle of Hastings took place in 1066. A disposition he would deny being responsible (or having the right to be convincing) that 1066 was the correct date. Radford would none the less insist that Jean know when the Battle occurred, since clearly be remembering the correct date. Radford admits that it would be inappropriate for Jean to say that he knew when the Battle of Hastings occurred, but, like Woozley he attributes the impropriety to a fact about when it is and is not appropriate to claim knowledge. When we claim knowledge, we ought, at least to believe that we have the knowledge we claim, or else our behaviour is ‘intentionally misleading’.
Those that agree with Radford’s defence of the separability thesis will probably think of belief as an inner state that can be detected through introspection. That Jean lack’s beliefs about English history is plausible on this Cartesian picture since Jean does not find himself with any beliefs about English history when ne seek them out. One might criticize Radford, however, by rejecting that Cartesian view of belief. One could argue that some beliefs are thoroughly unconscious, for example. Or one could adopt a behaviourist conception of belief, such as Alexander Bain’s (1859), according to which having beliefs is a matter of the way people are disposed to behave (and has not Radford already adopted a behaviourist conception of knowledge?) Since Jean gives the correct response when queried, a form of verbal behaviour, a behaviourist would be tempted to credit him with the belief that the Battle of Hastings occurred in 1066.
D.M. Armstrong (1873) takes a different tack against Radford. Jean does know that the Battle of Hastings took place in 1066. Armstrong will grant Radfod that point, in fact, Armstrong suggests that Jean believe that 1066 is not the date the Battle of Hastings occurred, for Armstrong equates the belief that such and such is just possible but no more than just possible with the belief that such and such is not the case. However, Armstrong insists, Jean also believes that the Battle did occur in 1066. After all, had Jean been mistaught that the Battle occurred in 1066, and subsequently ‘guessed’ that it took place in 1066, we would surely describe the situation as one in which Jean’s false belief about the Battle became unconscious over time but persisted of a memory trace that was causally responsible for his guess. Out of consistency, we must describe Radford’s original case as one that Jean’s true belief became unconscious but persisted long enough to cause his guess. Thus, while Jean consciously believes that the Battle did not occur in 1066, unconsciously he does believe it occurred in 1066. So after all, Radford does not have a counterexample to the claim that knowledge entails belief.
Armstrong’s response to Radford was to reject Radford’s claim that the examinee lacked the relevant belief about English history. Another response is to argue that the examinee lacks the knowledge Radford attributes to him (Sorenson, 1982). If Armstrong is correct in suggesting that Jean believes both that 1066 is and that it is not the date of the Battle of Hastings, one might deny Jean knowledge on the grounds that people who believe the denial of what they believe cannot be said t know the truth of their belief. Another strategy might be to compare the examinee case with examples of ignorance given in recent attacks on externalist accounts of knowledge (needless to say. Externalists themselves would tend not to favour this strategy). Consider the following case developed by BonJour (1985): For no apparent reason, Samantha believes that she is clairvoyant. Again, for no apparent reason, she one day comes to believe that the President is in New York City, even though she has every reason to believe that the President is in Washington, DC. In fact, Samantha is a completely reliable clairvoyant, and she has arrived at her belief about the whereabouts of the President thorough the power of her clairvoyance. Yet surely Samantha’s belief is completely irrational. She is not justified in thinking what she does. If so, then she does not know where the President is. But Radford’s examinee is unconventional. Even if Jean lacks the belief that Radford denies him, Radford does not have an example of knowledge that is unattended with belief. Suppose that Jean’s memory had been sufficiently powerful to produce the relevant belief. As Radford says, in having every reason to suppose that his response is mere guesswork, and he has every reason to consider his belief false. His belief would be an irrational one, and hence one about whose truth Jean would be ignorant.
Least has been of mention to an approaching view from which ‘perception’ basis upon itself as a fundamental philosophical topic both for its central place in ant theory of knowledge, and its central place un any theory of consciousness. Philosophy in this area is constrained by a number of properties that we believe to hold of perception, (1) It gives ‘us’ knowledge of the world around ‘us’. (2) We are conscious of that world by being aware of ‘sensible qualities’: Colour, sounds, tastes, smells, felt warmth, and the shapes and positions of objects in the environment. (3) Such consciousness is effected through highly complex information channels, such as the output of the three different types of colour-sensitive cells in the eye, or the channels in the ear for interpreting pulses of air pressure as frequencies of sound. (4) There ensues even more complex neurophysiological coding of that information, and eventually higher-order brain functions bring it about that we interpreted the information so received. (Much of this complexity has been revealed by the difficulties of writing programs enabling computers to recognize quite simple aspects of the visual scene.) The problem is to avoid thinking of here being a central, ghostly, conscious self, fed information in the same way that a screen if fed information by a remote television camera. Once such a model is in place, experience will seem like a veil getting between ‘us’ and the world, and the direct objects of perception will seem to be private items in an inner theatre or sensorium. The difficulty of avoiding this model is epically cute when we considered the secondary qualities of colour, sound, tactile feelings and taste, which can easily seem to have a purely private existence inside the perceiver, like sensation of pain. Calling such supposed items names like ‘sense-data’ or ‘percepts’ exacerbates the tendency, but once the model is in place, the first property, that perception gives ‘us’ knowledge of the world and its surrounding surfaces, is quickly threatened, for there will now seem little connection between these items in immediate experience and any independent reality. Reactions to this problem include ‘scepticism’ and ‘idealism’.
A more hopeful approach is to claim that the complexities of (3) and (4) explain how we can have direct acquaintance of the world, than suggesting that the acquaintance we do have been at best indirect. It is pointed out that perceptions are not like sensation, precisely because they have a content, or outer-directed nature. To have a perception is to be aware of the world for being such-and-such a way, than to enjoy a mere modification of sensation. But such direct realism has to be sustained in the face of the evident personal (neurophysiological and other) factors determining haw we perceive. One approach is to ask why it is useful to be conscious of what we perceive, when other aspects of our functioning work with information determining responses without any conscious awareness or intervention. A solution to this problem would offer the hope of making consciousness part of the natural world, than a strange optional extra.
Furthering, perceptual knowledge is knowledge acquired by or through the senses and includes most of what we know. We cross intersections when we see the light turn green, head for the kitchen when we smell the roast burning, squeeze the fruit to determine its ripeness, and climb out of bed when we hear the alarm ring. In each case we come to know something-that the light has turned green, that the roast is burning, that the melon is overripe, and that it is time to get up-by some sensory means. Seeing that the light has turned green is learning something-that the light has turned green-by use of the eyes. Feeling that the melon is overripe is coming to know a fact-that the melon is overripe-by one’s sense to touch. In each case the resulting knowledge is somehow based on, derived from or grounded in the sort of experience that characterizes the sense modality in question.
Much of our perceptual knowledge is indirect, dependent or derived. By this I mean that the facts we describe ourselves as learning, as coming to know, by perceptual means are pieces of knowledge that depend on our coming to know something else, some other fact, in a more direct way. We see, by the gauge, that we need gas, see, by the newspapers, that our team has lost again, see, by her expression, that she is nervous. This derived or dependent sort of knowledge is particularly prevalent in the cases of vision, but it occurs, to a lesser degree, in every sense modality. We install bells and other noise-makers so that we calm for example, hear (by the bell) that someone is at the door and (by the alarm) that its time to get up. When we obtain knowledge in this way, it is clear that unless one sees-hence, comes to know something about the gauge (that it says) and (hence, know) that one is described as coming to know by perceptual means. If one cannot hear that the bell is ringing, one cannot-in at least in this way-hear that one’s visitors have arrived. In such cases one sees (hears, smells, etc.) that ‘a’ is ‘F’, coming to know thereby that ‘a’ is ‘F’, by seeing (hearing, etc.) that some other condition, ‘b’s’ being ‘G’, obtains when this occurs, the knowledge (that ‘a’ is ‘F’) is derived from, or dependent on, the more basic perceptual knowledge that ‘b’ is ‘G’. Consciousness seems cognitive and brain sciences that over the past three decades that instead of ignoring it, many physicalists now seek to explain it (Dennett, 1991). Here we focus exclusively on ways those neuro-scientific discoveries have impacted philosophical debates about the nature of consciousness and its relation to physical mechanisms. Thomas Nagel argues that conscious experience is subjective, and thus permanently recalcitrant to objective scientific understanding. He invites us to ponder ‘what it is like to be a bat’ and urges the intuition that no amount of physical-scientific knowledge (including neuro-scientific) supplies a complete answer. Nagel's intuition pump has generated extensive philosophical discussion. At least two well-known replies make direct appeal to neurophysiology. John Biro suggests that part of the intuition pumped by Nagel, that bat experience is substantially different from human experience, presupposes systematic emerged as a topic in philosophy of mind and relations between physiology and phenomenology. Kathleen Akins (1993) delves deeper into existing knowledge of bat physiology and reports much that is pertinent to Nagel's question. She argues that many of the questions about bat subjectivity that we still consider open hinge on questions that remain unanswered about neuro-scientific details. One example of the latter is the function of various cortical activity profiles in the active bat.
More recently philosopher David Chalmers (1996) has argued that any possible brain-process account of consciousness will leave open an ‘explanatory gap’ between the brain process and properties of the conscious experience. This is because no brain-process theory can answer the "hard" question: Why should that particular brain process give rise to conscious experience? We can always imagine ("conceive of") a universe populated by creatures having those brain processes but completely lacking conscious experience. A theory of consciousness requires an explanation of how and why some brain process causes consciousness replete with all the features we commonly experience. The fact that the hard question remains unanswered shows that we will probably never get a complete explanation of consciousness at the level of neural mechanisms. Paul and Patricia Churchland have recently offered the following diagnosis and reply. Chalmers offer a conceptual argument, based on our ability to imagine creatures possessing brains like ours but wholly lacking in conscious experience. But the more one learns about how the brain produces conscious experience-and literature is beginning to emerge (e.g., Gazzaniga, 1995) - the harder it becomes to imagine a universe consisting of creatures with brain processes like ours but lacking consciousness. This is not just to bare assertions. The Churchlands appeal to some neurobiological detail. For example, Paul Churchland (1995) develops a neuro-scientific account of consciousness based on recurrent connections between thalamic nuclei (particularly "diffusely projecting" nuclei like the intralaminar nuclei) and the cortex. Churchland argues that the thalamocortical recurrency accounts for the selective features of consciousness, for the effects of short-term memory on conscious experience, for vivid dreaming during REM. (rapid-eye movement) sleep, and other "core" features of conscious experience. In other words, the Churchlands are claiming that when one learns about activity patterns in these recurrent circuits, one can't "imagine" or "conceive of" this activity occurring without these core features of conscious experience. (Other than just mouthing the words, "I am now imagining activity in these circuits without selective attention/the effects of short-term memory/vivid dreaming . . . ")
A second focus of sceptical arguments about a complete neuro-scientific explanation of consciousness is sensory qualia: the intro-spectable qualitative aspects of sensory experience, the features by which subjects discern similarities and differences among their experiences. The colours of visual sensations are a philosopher's favourite example. One famous puzzle about colour qualia is the alleged conceivability of spectral inversions. Many philosophers claim that it is conceptually possible (if perhaps physically impossible) for two humans not to differ neurophysiological, while the Collor that fire engines and tomatoes appear to have to one subject is the Collor that grass and frogs appear to have to the other (and vice versa). A large amount of neuro-scientifically-informed philosophy has addressed this question. A related area where neuro-philosophical considerations have emerged concerns the metaphysics of colours themselves (rather than Collor experiences). A longstanding philosophical dispute is whether colours are objective property’s Existing external to perceiver or rather identifiable as or dependent upon minds or nervous systems. Some recent work on this problem begins with characteristics of Collor experiences: For example that Collor similarity judgments produce Collor orderings that align on a circle. With this resource, one can seek mappings of phenomenology onto environmental or physiological regularities. Identifying colours with particular frequencies of electromagnetic radiation does not preserve the structure of the hue circle, whereas identifying colours with activity in opponent processing neurons does. Such a tidbit is not decisive for the Collor objectivist-subjectivist debate, but it does convey the type of neuro-philosophical work being done on traditional metaphysical issues beyond the philosophy of mind.
We saw in the discussion of Hardcastle (1997) two sections above that Neuro-philosophers have entered disputes about the nature and methodological import of pain experiences. Two decades earlier, Dan Dennett (1978) took up the question of whether it is possible to build a computer that feels pain. He compares and notes pressure between neurophysiological discoveries and common sense intuitions about pain experience. He suspects that the incommensurability between scientific and common sense views is due to incoherence in the latter. His attitude is wait-and-see. But foreshadowing Churchland's reply to Chalmers, Dennett favours scientific investigations over conceivability-based philosophical arguments.
Neurological deficits have attracted philosophical interest. For thirty years philosophers have found implications for the unity of the self in experiments with commissurotomy patients. In carefully controlled experiments, commissurotomy patients display two dissociable seats of consciousness. Patricia Churchland scouts philosophical implications of a variety of neurological deficits. One deficit is blind-sight. Some patients with lesions to primary visual cortex report being unable to see items in regions of their visual fields, yet perform far better than chance in forced guess trials about stimuli in those regions. A variety of scientific and philosophical interpretations have been offered. Ned Form (1988) worries that many of these conflate distinct notions of consciousness. He labels these notions ‘phenomenal consciousness’ (‘P-consciousness’) and ‘access consciousness’ (‘A-consciousness’). The former is that which, ‘what it is like-ness of experience. The latter is the availability of representational content to self-initiated action and speech. Form argues that P-consciousness is not always representational whereas A-consciousness is. Dennett and Michael Tye are sceptical of non-representational analyses of consciousness in general. They provide accounts of blind-sight that do not depend on Form's distinction.
Many other topics are worth neuro-philosophical pursuit. We mentioned commissurotomy and the unity of consciousness and the self, which continues to generate discussion. Qualia beyond those of Collor and pain have begun to attract neuro-philosophical attention has self-consciousness. The first issue to arise in the ‘philosophy of neuroscience’ (before there was a recognized area) was the localization of cognitive functions to specific neural regions. Although the ‘localization’ approach had dubious origins in the phrenology of Gall and Spurzheim, and was challenged severely by Flourens throughout the early nineteenth century, it reemerged in the study of aphasia by Bouillaud, Auburtin, Broca, and Wernicke. These neurologists made careful studies (where possible) of linguistic deficits in their aphasic patients followed by brain autopsies postmortem. Broca's initial study of twenty-two patients in the mid-nineteenth century confirmed that damage to the left cortical hemisphere was predominant, and that damage to the second and third frontal convolutions was necessary to produce speech production deficits. Although the anatomical coordinates’ Broca postulates for the ‘speech production centres do not correlate exactly with damage producing production deficits, both are that in this area of frontal cortex and speech production deficits still bear his name (‘Broca's area’ and ‘Broca's aphasia’). Less than two decades later Carl Wernicke published evidence for a second language centre. This area is anatomically distinct from Broca's area, and damage to it produced a very different set of aphasic symptoms. The cortical area that still bears his name (‘Wernicke's area’) is located around the first and second convolutions in temporal cortex, and the aphasia that bears his name (‘Wernicke's aphasia’) involves deficits in language comprehension. Wernicke's method, like Broca's, was based on lesion studies: a careful evaluation of the behavioural deficits followed by post mortem examination to find the sites of tissue damage and atrophy. Lesion studies suggesting more precise localization of specific linguistic functions remain a cornerstone to this day in aphasic research.
Lesion studies have also produced evidence for the localization of other cognitive functions: For example, sensory processing and certain types of learning and memory. However, localization arguments for these other functions invariably include studies using animal models. With an animal model, one can perform careful behavioural measures in highly controlled settings, then ablate specific areas of neural tissue (or use a variety of other techniques to Form or enhance activity in these areas) and remeasure performance on the same behavioural tests. But since we lack an animal model for (human) language production and comprehension, this additional evidence isn't available to the neurologist or neurolinguist. This fact makes the study of language a paradigm case for evaluating the logic of the lesion/deficit method of inferring functional localization. Philosopher Barbara Von Eckardt (1978) attempts to make explicit the steps of reasoning involved in this common and historically important method. Her analysis begins with Robert Cummins' early analysis of functional explanation, but she extends it into a notion of structurally adequate functional analysis. These analyses break down a complex capacity C into its constituent capacity’s c1, c2, . . . cn, where the constituent capacities are consistent with the underlying structural details of the system. For example, human speech production (complex capacity ‘C’) results from formulating a speech intention, then selecting appropriate linguistic representations to capture the content of the speech intention, then formulating the motor commands to produce the appropriate sounds, then communicating these motor commands to the appropriate motor pathways (constituent capacity’s c1, c2, . . . , cn). A functional-localization hypothesis has the form: Brain structure S in an organism (type) O has constituent capacity ci, where ci is a function of some part of O. An example, Brains Broca's area (S) in humans (O) formulates motor commands to produce the appropriate sounds (one of the constituent capacities C1). Such hypotheses specify aspects of the structural realization of a functional-component model. They are part of the theory of the neural realization of the functional model.
Armed with these characterizations, Von Eckardt argues that inference to a functional-localization hypothesis proceeds in two steps. First, a functional deficit in a patient is hypothesized based on the abnormal behaviour the patient exhibits. Second, localization of function in normal brains is inferred on the basis of the functional deficit hypothesis plus the evidence about the site of brain damage. The structurally-adequate functional analysis of the capacity connects the pathological behaviour to the hypothesized functional deficit. This connection suggests four adequacy conditions on a functional deficit hypothesis. First, the pathological behaviour ‘P’ (e.g., the speech deficits characteristic of Broca's aphasia) must result from failing to exercise some complex capacity ‘C’ (human speech production). Second, there must be a structurally-adequate functional analysis of how people exercise capacity ‘C’ that involves some constituent capacity C1 (formulating motor commands to produce the appropriate sounds). Third, the operation of the steps described by the structurally-adequate functional analysis minus the operation of the component performing ci (Broca's area) must result in pathological behaviour P. Fourth, there must not be a better available explanation for why the patient does P. Arguments to a functional deficit hypothesis on the basis of pathological behaviour is thus an instance of argument to the best available explanation. When postulating a deficit in a normal functional component provides the best available explanation of the pathological data, we are justified in drawing the inference.
Von Eckardt applies this analysis to a neurological case study involving a controversial reinterpretation of agnosia. Her philosophical explication of this important neurological method reveals that most challenges to localization arguments of whether to argue only against the localization of a particular type of functional capacity or against generalizing from localization of function in one individual to all normal individuals. (She presents examples of each from the neurological literature.) Such challenges do not impugn the validity of standard arguments for functional localization from deficits. It does not follow that such arguments are unproblematic. But they face difficult factual and methodological problems, not logical ones. Furthermore, the analysis of these arguments as involving a type of functional analysis and inference to the best available explanation carries an important implication for the biological study of cognitive function. Functional analyses require functional theories, and structurally adequate functional analyses require checks imposed by the lower level sciences investigating the underlying physical mechanisms. Arguments to best available explanation are often hampered by a lack of theoretical imagination: the available explanations are often severely limited. We must seek theoretical inspiration from any level of theory and explanation. Hence making explicit the ‘logic’ of this common and historically important form of neurological explanation reveals the necessity of joint participation from all scientific levels, from cognitive psychology down to molecular neuroscience. Von Eckardt anticipated what came to be heralded as the ‘co-evolutionary research methodology,’ which remains a centerpiece of neurophilosophy to the present day.
Over the last two decades, evidence for localization of cognitive function has come increasingly from a new source: the development and refinement of neuroimaging techniques. The form of localization-of-function argument appears not to have changed from that employing lesion studies (as analysed by Von Eckardt). Instead, these imaging technologies resolve some of the methodological problems that plage lesion studies. For example, researchers do not need to wait until the patient dies, and in the meantime probably acquires additional brain damage, to find the lesion sites. Two functional imaging techniques are prominent: Positron emission tomography, or PET, and functional magnetic resonance imaging, or MRI. Although these measure different biological markers of functional activity, both now have a resolution down to around 1mm. As these techniques increase spatial and temporal resolution of functional markers and continue to be used with sophisticated behavioural methodologies, the possibility of localizing specific psychological functions to increasingly specific neural regions continues to grow
What we now know about the cellular and molecular mechanisms of neural conductance and transmission is spectacular. The same evaluation holds for all levels of explanation and theory about the mind/brain: maps, networks, systems, and behaviour. This is a natural outcome of increasing scientific specialization. We develop the technology, the experimental techniques, and the theoretical frameworks within specific disciplines to push forward our understanding. Still, a crucial aspect of the total picture gets neglected: the relationship between the levels, the ‘glue’ that binds knowledge of neuron activity to subcellular and molecular mechanisms, network activity patterns to the activity of and connectivity between single neurons, and behaviour to network activity. This problem is especially glaring when we focus on the relationship between ‘cognitivist’ psychological theories, postulating information-bearing representations and processes operating over their contents, and the activity patterns in networks of neurons. Co-evolution between explanatory levels still seems more like a distant dream rather than an operative methodology.
It is here that some neuroscientists appeal to ‘computational’ methods. If we examine the way that computational models function in more developed sciences (like physics), we find the resources of dynamical systems constantly employed. Global effects (such as large-scale meteorological patterns) are explained in terms of the interaction of ‘local’ lower-level physical phenomena, but only by dynamical, nonlinear, and often chaotic sequences and combinations. Addressing the interlocking levels of theory and explanation in the mind/brain using computational resources that have worked to bridge levels in more mature sciences might yield comparable results. This methodology is necessarily interdisciplinary, drawing on resources and researchers from a variety of levels, including higher levels like experimental psychology, ‘program-writing’ and ‘connectionist’ artificial intelligence, and philosophy of science.
However, the use of computational methods in neuroscience is not new. Hodgkin, Huxley, and Katz incorporated values of voltage-dependent potassium conductance they had measured experimentally in the squid giant axon into an equation from physics describing the time evolution of a first-order kinetic process. This equation enabled them to calculate best-fit curves for modelled conductance versus time data that reproduced the S-shaped (sigmoidal) function suggested by their experimental data. Using equations borrowed from physics, Rall (1959) developed the cable model of dendrites. This theory provided an account of how the various inputs from across the dendritic tree interact temporally and spatially to determine the input-output properties of single neurons. It remains influential today, and has been incorporated into the genesis software for programming neurally realistic networks. More recently, David Sparks and his colleagues have shown that a vector-averaging model of activity in neurons of superior caliculi correctly predicts experimental results about the amplitude and direction of saccadic eye movements. Working with a more sophisticated mathematical model, Apostolos Georgopoulos and his colleagues have predicted direction and amplitude of hand and arm movements based on averaged activity of 224 cells in motor cortices. Their predictions have borne out under a variety of experimental tests. We mention these particular studies only because we are familiar with them. We could multiply examples of the fruitful interaction of computational and experimental methods in neuroscience easily by one-hundred-fold. Many of these extend back before ‘computational neuroscience’ was a recognized research endeavour.
We've already seen one example, the vector transformation account, of neural representation and computation, under active development in cognitive neuroscience. Other approaches using ‘cognitivist’ resources are also being pursued. Many of these projects draw upon ‘cognitivist’ characterizations of the phenomena to be explained. Many exploit ‘cognitivist’ experimental techniques and methodologies. Some even attempt to derive ‘cognitivist’ explanations from cell-biological processes (e.g., Hawkins and Kandel 1984). As Stephen Kosslyn puts it, cognitive neuro-scientists employ the ‘information processing’ view of the mind characteristic of cognitivism without trying to separate it from theories of brain mechanisms. Such an endeavour calls for an interdisciplinary community willing to communicate the relevant portions of the mountain of detail gathered in individual disciplines with interested nonspecialists: not just people willing to confer with those working at related levels, but researchers trained in the methods and factual details of a variety of levels. This is a daunting requirement, but it does offer some hope for philosophers wishing to contribute to future neuroscience. Thinkers trained in both the ‘synoptic vision’ afforded by philosophy and the factual and experimental basis of genuine graduate-level science would be ideally equipped for this task. Recognition of this potential niche has been shown among graduate programs in philosophy, but there is some hope that a few programs are taking steps to fill it.
In the final analysis there will be philosophers unprepared to accept that, if a given cognitive capacity is psychologically real, then there must be an explanation of how it is possible for an individual in the course of human development to acquire that cognitive capacity, or anything like it, can have a role to play in philosophical accounts of concepts and conceptual abilities. The most obvious basis for such a view would be a Frégean distrust of “psychology” that leads to a rigid division of labour between philosophy and psychology. The operative thought is that the task of a philosophical theory of concepts is to explain what a given concept is or what a given conceptual ability consist in. This, it is frequently maintained, is something that can be done in complete independence of explaining how such a concept or ability might be acquired. The underlying distinction is one between philosophical questions centring around concept possession and psychological questions centring around concept possibilities for an individual to acquire that ability, then it cannot be psychologically real. Nevertheless, this distinction is, however, strictly one does adhere to the distinction, it provides no support for a rejection of any given cognitive capacity for which is psychologically real. The neo-Frégean distinction is directly against the view that facts about how concepts are acquired have a role to play in explaining and individualizing concepts. But this view does not have to be disputed by a supporter as such, nonetheless, all that the supporter is to commit is that the principle that no satisfactory account of what a concept is should make it impossible to provide explanation of how that concept can be acquired. That is, that this principle has nothing to say about the further question of whether the psychological explanation has a role to play in a constitutive explanation of the concept, and hence is not in conflict with the neo-Frégean distinction.
The world-view, whereby modernity is to assume that communion with the essences of physical reality and associated theories was possible, but it made no other provisions for the knowing mind. In that, the totality from which modern theory contributes to a view of the universe as an unbroken, undissectible, and undivided dynamic whole. Even so, a complicated tissue of an event, in which connections of different kinds alternate or overlay or combine and in such a way determine the texture of the whole. Errol Harris noted in thinking about the special character of wholeness in modern epistemology, a unity with internal content is a blank or empty set and is not recognized as a whole. A collection of merely externally related parts does not constitute a whole in that the parts will not be “mutually adaptive and complementary to one another.”
Wholeness requires a complementary relationship between unity and difference and is governed by a principle of organization determining the interrelationship between parts. This organizing principle must be universal to a genuine whole and implicit in all parts that constitute the whole, even though the whole is exemplified in its parts. This principle of order, “is nothing real in and of itself. It is the way of the parts are organized, and not another consistent additional to those that constitute the totality.”
In a genuine whole, the relationships between the constituent parts must be “internal or immanent” in the parts, as opposed to a more spurious whole in which parts appear to disclose wholeness due to relationships that are external to the parts. The collections of parts that would allegedly constitute the whole in both subjective theory and physical reality are each exampled of the spurious whole. Parts constitute a genuine whole when the universal principle of order is inside the parts and thereby adjusts each to all that they interlock and become mutually binding. All the same, it is also consistent with the manner in which we have begun to understand the relation between parts and whole in modern biology.
Much of the ambiguity to explain the character of wholes in both physical reality and biology derives from the assumption that order exists between or outside parts. But order complementary relationships between difference and sameness in any physical reality as forwarded through physical events is never external to that event - the connections are immanent in the event. From this perspective, the addition of non-locality to this picture of the dynamic whole is not surprising. The relationship between part, as quantum events apparent in observation or measurement, and the undissectible whole: Having revealed but not described by the instantaneous correlations between measurements in space-like separated regions, is another extension of the part-whole complementarity in modern physical reality.
If the universe is a seamlessly interactive system that evolves to higher levels of complexity and if the lawful regularise of this universe are emergent properties of this system, we can assume that the cosmos is a single significant whole that evinces progressive order in complementary relations to its parts. Given that this whole exists in some sense within all parts, one can then argue that it operates in self-reflective fashions and is the ground for all emergent complexity. Since, human consciousness evinces self-reflective awareness in the human brain and since this brain, like all physical phenomena, can be viewed as an emergent property of the whole, it is unreasonable to conclude, in philosophical terms at least, that the universe is conscious.
But since the actual character of this seamless whole cannot be represented or reduced to its parts, it lies, quite literally, beyond all human representations or descriptions. If one chooses to believe that the universe be a self-reflective and self-organizing whole, this lends no support whatsoever to conceptions of design, meaning, purpose, intent, or plan associated with mytho-religious or cultural heritage. However, if one does not accept this view of the universe, there is nothing in the scientific description of nature that can be used to refute this position. On the other hand, it is no longer possible to argue that a profound sense of unity with the whole, which has long been understood as the foundation to religious experience, can be dismissed, undermined, or invalidate with appeals to scientific knowledge.
A full account of the structure of consciousness, will need to illustrate those higher, conceptual forms of consciousness to which little attention on such an account will take and about how it might emerge from given points of value, is the thought that an explanation of everything that is distinctive about consciousness will emerge out of an account of what it is for a subject, to be capable of thinking about himself. But, to a proper understanding of the complex phenomenon of consciousness. There are no facts about linguistic mastery that will determine or explain what might be termed the cognitive dynamics that are individual processes that have found their way forward for a theory of consciousness, it sees, to chart the characteristic features individualizing the various distinct conceptual forms of consciousness in a way that will provide a taxonomy of unconsciousness they to will show in what way the manifesting characterlogical functions that can to determine at the level of content. What so is, our promising images of hope, accomplishes the responsibilities that these delegated forms of higher forms of consciousness emerge from a rich foundation of non-conceptual representations of thought, which can only expose and clarify their conviction that these forms of conscious thought hold the key, not just to an eventful account of how mastery of the conscious paradigms, but to a proper understanding of the plexuity of self-consciousness and/or the overall conjecture of consciousness that stands alone as to an everlasting, and the ever unchangeless states of unconsciousness, in the abysses which are held by some estranged crypto-mystification in enciphering cryptanalysis.
And, yet, to believe a proposition is to hold to be true, incorporates the philosophical problems that include discovering whether beliefs differ from varieties of assent, such as acceptance, discovering to what extent degree of belief are possible, understanding the ways in which belief is controlled by rational and irrational factors, And discovering its links with other properties, such as the possession of conceptual or linguistic skills. This last set of problems includes the question of whether prelinguistic infants or animals are proprieties said to have beliefs
Traditionally, belief has been of epistemological interest in its propositional guise: ‘S’
believes that ‘p’, where ‘p’ is a proposition toward which an agent, ‘S’, exhibits an attitude of acceptance. Not all belief is of this sort. If I trust what you say, I believe you. And someone may believe in Mrs. Thatcher, or in a free-market economy, or in God. It is sometimes supposed that all belief is ‘reducible’ to propositional belief, belief-that. Thus, my believing you might be thought a matter of my believing, perhaps, that what you say is true, and tour belief in free markets or in God, a matter of your believing that free-market economics are desirable or that God exists.
It is doubtful, however, that non-propositional believing can, in every casse, be reduced in this way. Debate on this point has tended to focus on an apparent distinction between belief-that and belief-in, and the application of this distinction to belief in God. Some philosophers have followed Aquinas in supposing that to believe in God is simply to believe that certain truths hold that God exists, that he is benevolent, etc. Others (e.g., Hick, 157) argues that brief-in is a distinctive attitude, one that include s essentially an element of trust. More commonly, belief-in has been taken to involve a combination of propositional belief together with some further attitude.
H.H. Price (1969) defends the claim that there are different sorts of belief-in, some, but not all, reducible to beliefs-that. If you believe in God, etc. But, according to Price, your belief involves, in addition, a certain complex pro-attitude toward its object. One might attempt to analyse tis further attitude in terms of additional beliefs-that: ‘S’ believes in ‘X’ just in case (1) ‘S’ believes that ‘X’ exists (and perhaps holds further factual beliefs about ‘X’) (2) ‘S’ beliefs that ‘X’ is good or valuable in some respect, and (3) ‘S’ believes that ’X’s’ being good or valuable in this respect is itself is a good thing. An analysis of this sort, however, fails adequately to capture the further affective component of belief-in. Thus, according to Price, if you believe in God, your beliefs not merely that certain truths hold, you possess, in addition, an attitude if commitment and trust toward God.
Notoriously, belief-in outruns the evidence for the corresponding belief-that. Does this diminish its rationality? If belief-in presupposes belief-that, it might be thought that the evidential standards for the former must be at least as high as standards for the latter. And any additional pro-attitude might be thought to require further justification not required for case of belief-that.
Some philosophers have argued that, at least for cases in which belief-in is synonymous with faith (or faith-in), evidential thresholds for constituent propositional beliefs are diminished (Audi, 1990). You may reasonably have faith in God or one to many governmental officials respectively, even though beliefs about their respective attitudes, were you to harbour them, would be evidentially substandard.
Belief-in may be, in general less susceptible to alternation in the face of unfavourable evidence than belief-that. A believer which encounters evidence against God’s exists may remain an undiminished belief, in pas t because the evidence does not bear on his pro-attitude. So long a this is united with his belief that God exists. The belief may survive epistemic buffeting and reasonably so, in that any other formed ordinary propositional belief that would not.
To place, position, or put through the informalities to finding reason and causes, the freeing liberation to express of such a definable emergence. Justly, when we act for a reason, is the reason a cause of our action? Is explaining an action by means if giving the reason for which it is done, a kind of causal explanation? The view that it will not cite the existence of a logical relation between an action and its reason: It will say that an action would not be the action it is if it did not get its identity from its place in an intentional plan of the agent (it would just be a pierce of behaviour, not explicable by reasons at all). Reasons and actions are not the ‘loose and separate’ events between which causal relations hold. The contrary view, espoused by Davidson, in his influential paper “Actions, Reasons, and Causes” (1963), claims that the existence of a reason is a mental event, and unless this event is causally linked to the acting we could not say that it is the reason for which the action is performed: Actions may be performed for one reason than of another, and the reason that explains then is the one that is causally efficacious in prompting the action.
The distinction between reason and causes is motivated in good part by s desire to separate the rational from the natural order. Historically, it probably traces back at least to Aristotle’s similar (but not identical) distinction between final and efficient, recently, the contract has been drawn primarily in the domain of actions and, secondarily, elsewhere.
Many who have insisted on distinguishing reasons from causes have failed to distinguish two kinds of reason. Consider my reason for sending a letter by express mail. Asked why I did so, I might say I wanted to get it there in a day, or simply, to get it there in a day. strictly, the reason is expressed by ‘to get it there in a day’. But what this expresses is my reason only because I am suitably motivated’: I am in a reason state, wanting to get the letter there in a day. It is reason states - especially want, belief and intentions - and no reasons strictly, so called, that are candidates for causes. The later are abstract contents of propositional attitude, the former are psychological elements that play motivational roles.
If reason states can motivate, however, why (apart from confusing them with reason proper) deny that they are causes? For one thing they are not events, at least in the usual sense entailing change: They are dispositional states (this contrasts them with occurrences, but does not imply that they admit of dispositional analysis). It has also seemed to those who deny that reason are causes that the former justly as well as explain the actions for which they are reasons where the role at cayuses is at not to explain. Another claim is hat the relation between reasons (and here reason states are often cited explicitly) and the actions they explain is non-contingent, whereas the relation of causes to their effect is contingent. The ‘logical connection argument’ proceed from this claim to her conclusion that reasons ae not causes.
These arguments are inconclusive. First, even if causes are events, sustaining causation may explain, as where the (state of) standing of a broken table is explained by the (conditions of) support of stacked boards replacing its missing legs. Second, the ‘because’ in ‘I sent it by express because I wanted to get it there in a day’ is in some sense causal - indeed, where it is not so taken, this purported explanation would at best be construed as only rationalized, than justifying, my action. And third, if any non-contingent connection can be established between, sa y, my wanting some thing and the action it explains, there are close causal analogues, such as the connection between bringing a magnet to iron filings and their gravitating to it: This is, after all, a ‘definitive’ connection, expressing part of what it is to be magnetic, yet the magnet causes the filings to move .
There is, then, a clear distinction between reasons proper and causes, and even between reason states and event causes, : But, the distinction cannot be used to show that the relation between reasons and the actions they justify is in no way causal. Precisely parallel point hold in the epistemic domain (and for all propositional attitudes, since they all similarly admit of justification, and explanation, by reasons). Suppose my reason for believing that you received my letter today is that I sent it by express yesterday . My reason, strictly speaking, is that I sent it by express yesterday, my reason justifies the further proportion I believe of which it is my reason, and my reason state - my evidence belief - both explain and justifies my belief that you received the letter today. I can say that what justifies that belief is (in fat) that I sen t the letter by express yesterday, but this statement expresses my believing that evidence proposition, and if I do not believe it then my belief that you received the letter is not justified: It is not justified by the mere truth of that proposition (and can be justified eve n if that preposition is false).
Similarly, there are, or beliefs as for action, at least five main kinds of reasons: (1) normative reasons, reasons (objective grounds) there are to believe (say, to believe that there is a greenhouse effect): (2) person-relative normative reasons, reasons for (say) me to believe: (3) subjective reasons, reasons I have to believe (4) explanatory reasons, reasons why I believe and (5) motivating reasons, reasons for which I believe. (1) and (2) are proposition and thus not serious candidates to be causal factors. The states corresponding to (3) may or may not be causal elements, reasons why, case (4) are always (sustaining) explainers, though not necessarily even prima facie justifiers, since a belief can be causally sustained by factors with no evidential value. Motivating reasons minimal justificatory power (if any) a reason must have to be a basis of belief.
Finally, the natural tendency of the mind is to be restless. Thinking seems to be a continuous and ongoing activity. The restless mind lets thoughts come and go incessantly from morning till night. They give us no rest for a moment. Most of these thoughts are not exactly invited; they just come, occupy our attention for a while, and then disappear. Our true essence can be likened to the sky, and our thoughts are the clouds. The clouds drift through the sky, hide it for a while and then disappear. They are not permanent. So are thoughts. Because of their incessant movement they hide our essence, our core, and then move away to make room for other thoughts. Thoughts resemble the waves of the ocean, always in a state of motion, never standing still. These thoughts arise in our mind due to many reasons. There is a tendency on the part of the mind to analyse whatever it contacts. It likes to compare, to reason, and to ask questions. It constantly indulges in these activities.
Everyone's mind has a kind of a filter, which allows it to accept, let in certain thoughts, and reject others. This is the reason why some people occupy their minds with thoughts about a certain subject, while others don't even think about the same subject.
Why some people are attracted to football and others don't? Why some love and admire a certain singer and others don't? Why some people think incessantly about a certain subject, and others never think about it? It is all due to this inner filter. This is an automatic unconscious filter. We never stop and say to certain thoughts 'come' and to others we say 'go away'. It is an automatic activity. This filter was built during the years. It was and is built constantly by the suggestions and words of people we meet, and as a consequence of our daily experiences.
Every event, happening or word has an affect on the mind, which produces thoughts accordingly. The mind is like a thought factory, working in shifts day and night, producing thoughts. The mind also gets thoughts directly from the surrounding world. The space around us is full of thoughts, which we constantly pick, let pass through our minds, and then pick up new ones. It is like catching fish in the ocean, throwing them back into the water and then catching a new ones.
This activity of the restless mind occupies our attention all the time. Now our attention is on this thought and then on another one. We pay a lot of energy and attention to these passing thoughts. Most of them are not important. They just waste our time and energy.
This is enslavement. It is as if some outside power is always putting a thought in front of us to pay attention to. It is like a relentless boss constantly giving us a job to do. There is no real freedom. We enjoy freedom only when we are able to still the mind and choose our thoughts. There is freedom, when we are able to decide which thought to think and which one to reject. We live in freedom, when we are able to stop the incessant flow of thoughts.
Stopping the flow of thoughts may look infeasible, but constant training and exercising with concentration exercises and meditation, eventually lead to this condition. The mind is like an untamed animal. It can be taught self-discipline and obedience to a higher power. Concentration and meditation show us in a clear and practical manner that we, the inner true essences, are this controlling power. We are the bosses of our minds.
That’s to say, in whatever way possible, no assumptions are to be taken
for granted, as no thoughtful conclusion should be lightly dismissed as fallacious in the study assembled through the phenomenon of consciousness. Becoming even more so, when exercising the ingenuous humanness that caution measures, that we must try to move ahead to reach forward into the positive conclusion to its topic.
Many writers, along with a few well-known new-age gurus, have played fast and loosely with firm interpretations of some new but informal understanding grounded within the mental in some vague sense of cosmic consciousness. However, these new age nuances are ever so erroneously placed in the new-age section of a commercial bookstore and purchased by those interested in new-age literature, and they will be quite disappointed.
What makes our species unique is the ability to construct a virtual world in which the real world can be imaged and manipulated in abstract forms and idea. Evolution has produced hundreds of thousands of species with brains, in which tens of thousands of species with complex behavioural and learning abilities. In that respect are also many species in which sophisticated forms of group communication have evolved. For example, birds, primates, and social carnivores use extensive vocal and gestural repertoires to structure behaviour in large social groups. Although we share roughly 98 percent of our genes with our primate cousins, the course of human evolution widened the cognitive gap between us and all other species, including our cousins, into a yawning chasm.
Research in neuroscience has shown that language processing is a staggeringly complex phenomenon that places incredible demands on memory and learning. Language functions extend, for example, into all major lobes of the neocortex: Auditory opinion is associated with the temporal area; tactile information is associated with the parietal area, and attention, working memory, and planning are associated with the frontal cortex of the left or dominant hemisphere. The left prefrontal region is associated with verb and noun production tasks and in the retrieval of words representing action. Broca’s area, next to the mouth-tongue region of a motor cortex, is associated with vocalization in word formation, and Wernicke’s area, by the auditory cortex, is associated with sound analysis in the sequencing of words.
Lower brain regions, like the cerebellum, have also evolved in our species to help in language processing. Until recently, we thought the cerebellum to be exclusively involved with automatic or preprogrammed movements such as throwing a ball, jumping over a high hurdle or playing noted orchestrations as on a musical instrument. Imaging studies in neuroscience suggest, however, that the cerebellum awaken within the smoldering embers brought aflame by the sparks of awakening consciousness, to think communicatively during the spoken exchange. Mostly actuated when the psychological subject occurs in making difficult the word associations that the cerebellum plays a role in associations by providing access to automatic word sequences and by augmenting rapid shifts in attention.
The midbrain and brain stem, situated on top of the spinal cord, coordinate and articulate the numerous amounts of ideas and output systems that, to play an extreme and crucial role in the interplay through which we have adaptively adjusted and coordinated the distributable dynamic communicative functions. Vocalization has some special associations with the midbrain, which coordinates the interaction of the oral and respiratory tracks necessary to make speech sounds. Since this vocalization requires synchronous activity among oral, vocal, and respiratory muscles, these functions probably connect to a central site. This site resembles the central greyness founded around the brain. The central gray area links the reticular nuclei and brain stem motor nuclei to comprise a distributed network for sound production. While human speech is dependent on structures in the cerebral cortex, and on rapid movement of the oral and vocal muscles, this is not true for vocalisation in other mammals.
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