ONT Re: Quine -- Two Dogmas Of Empiricism
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TDOE. Note 15
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| 3. Interchangeability (cont.)
|
| In an extensional language, therefore, interchangeability
| 'salva veritate' is no assurance of cognitive synonymy of
| the desired type. That "bachelor" and "unmarried man" are
| interchangeable 'salva veritate' in an extensional language
| assures us of no more than that (3) is true. There is no
| assurance here that the extensional agreement of "bachelor"
| and "unmarried man" rests on meaning rather than merely on
| accidental matters of fact, as does the extensional agreement
| of "creature with a heart" and "creature with kidneys".
|
| For most purposes extensional agreement is the nearest approximation
| to synonymy we need care about. But the fact remains that extensional
| agreement falls far short of cognitive synonymy of the type required for
| explaining analyticity in the manner of Section 1. The type of cognitive
| synonymy required there is such as to equate the synonymy of "bachelor"
| and "unmarried man" with the analyticity of (3), not merely with the
| truth of (3).
|
| So we must recognize that interchangeability 'salva veritate',
| if construed in relation to an extensional language, is not
| a sufficient condition of cognitive synonymy in the sense
| needed for deriving analyticity in the manner of Section 1.
| If a language contains an intensional adverb "necessarily" in
| the sense lately noted, or other particles to the same effect,
| then interchangeability 'salva veritate' in such a language
| does afford a sufficient condition of cognitive synonymy;
| but such a language is intelligible only in so far as the
| notion of analyticity is already understood in advance.
|
| Quine, "Two Dogmas", p. 31.
|
| W.V. Quine,
|"Two Dogmas of Empiricism", 'Philosophical Review', January 1951.
| Reprinted as pages 20-46 in 'From a Logical Point of View',
| 2nd edition, Harvard University Press, Cambridge, MA, 1980.
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