The Philosophy of Philosophy. Timothy Williamson. Читать онлайн. Newlib. NEWLIB.NET

Автор: Timothy Williamson
Издательство: John Wiley & Sons Limited
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Жанр произведения: Афоризмы и цитаты
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isbn: 9781119616726
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a sentence true by stipulative definition. For example, I might introduce the term “zzz” (pronounced as a buzz) by saying “A zzz is a short sleep” and thereby make “A zzz is a short sleep” true. What prevents us from using such cases as paradigms to fix a semantic notion of analyticity on which analytic truths are insubstantial?

      The metaphysics and semantics of analytic truths are no substitute for their epistemology. If their epistemology is as distinctive as is often supposed, that is not the outcome of a corresponding distinctiveness in their metaphysics or semantics. It can only be captured by confronting their epistemology directly. We therefore turn to epistemological accounts of analyticity.

      Notes

      1 1 To give just one example, even Jack Smart, whose work robustly engages the nature of the non-linguistic, non-conceptual world and who described metaphysics as “a search for the most plausible theory of the whole universe, as it is considered in the light of total science” (1984: 138), could also write that philosophy is “in some sense a conceptual inquiry, and so a science can be thought of as bordering on philosophy to the extent to which it raises within itself problems of a conceptual nature” (1987: 25), although he admits that he “cannot give a clear account of what I have meant when earlier in this essay I have said that some subjects are more concerned with “conceptual matters” than are others” (1987: 32).

      2 2 The overall criticism of Quine’s procedure goes back to Grice and Strawson (1956). Sober (2000) argues that Quine violates his own methodological naturalism in criticizing semantic notions on foundational grounds without considering their use in science.

      3 3 Given Kripke’s arguments, defining “analytic” as the conjunction of “a priori” and “necessary” does not yield a natural notion, since a disjunction of an a priori contingency with an unrelated a posteriori necessity will then count as analytic: it is a priori because its first disjunct is and necessary because its second disjunct is. One does somewhat better by defining “analytic” as “a priori necessary,” which excludes that example, although the point of such a combination of epistemological and metphysical elements remains to be explained. The arguments below apply to this notion too. Of course, Kripke’s main concern is the difference between the a priori / a posteriori and the necessary/contingent distinctions; he clarifies their differences from the analytic/synthetic distinction in passing. Nevertheless, the differentiation between the first two distinctions forces the demotion of the third from that of trying to play both the first role and the second.

      4 4 See Boghossian (1997) for the distinction between metaphysical and epistemological accounts of analyticity, and Tappenden (1993: 240) for a somewhat similar distinction.

      5 5 Etchemendy (1990: 107–24) contrasts “substantive” generalizations with logical ones. The idea is widespread. It occurs in different forms in Wittgenstein’s Tractatus Logico-Philosophicus and in Locke’s “Of trifling propositions” (An Essay Concerning Human Understanding, Book IV, Chapter viii).

      6 6 Since analytic truths are standardly taken to be sentences, the term “true” will sometimes be applied to sentences, as well as to thoughts and propositions; where required, the context makes clear what kind of truth-bearer is intended. Talk of knowing or believing a sentence should be understood as elliptical for talk of having knowledge or belief which one can express with the sentence (on its standard meaning). Thus someone who knows “Grass is green” knows that grass is green and can express that knowledge by saying “Grass is green”; this is not to be confused with the metalinguistic knowledge that the sentence “Grass is green” is true.

      7 7 Proof: Assume (Taslr), (Faslr) and (Tasrl). To derive (Ta), note that it is equivalent to the conjunction of two claims: (i) if “P” is analytically true, then “P” is analytically true if and only if P; (ii) if “P” is analytically false, then “P” is analytically true if and only if P. Now (i) is logically equivalent to the claim that “P” is analytically true only if P, which follows from (Taslr). Moreover, by (Faslr) “P” is analytically false only if not P; as just seen “P” is analytically true only if P, so “P” is analytically false only if “P” is not analytically true; thus if “P” is analytically false then both sides of the biconditional in the consequent of (ii) fail, so (ii) holds. To derive (Ts), first note that “P” is synthetically true only if P by (Taslr). Conversely, if P then “P” is analytically true or synthetically true by (Tasrl); since by the antecedent of (Ts) it is not analytically true, it is synthetically true. Incidentally, by themselves (Ta) and (Ts) are weak in other ways too; in particular, they do not entail that nothing can be both analytically true and synthetically true.

      8 8 For related arguments see Williamson (1994b: 141–2) and Tappolet (1997).

      9 9 See Boghossian (1997: 335–6). Quine says that we can say that the logical truth “Everything is self-identical” depends for its truth “on an obvious trait, viz., self-identity, of its subject matter, viz., everything.” However, he claims that it makes no difference whether we say that or say that it depends for its truth “on traits of the language (specifically on the usage of “=”), and not on traits of its subject matter” (1966: 106).

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