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19. Language / A. Nature of Meaning / 8. Synonymy

[whether two items can have identical meaning]

8 ideas
Single words are strongly synonymous if their interchange preserves truth [Quine]
     Full Idea: We can define, it would seem, a strong synonymy relation for single words by them being interchangeable salva veritate.
     From: Willard Quine (Philosophy of Logic [1970], Ch.1)
     A reaction: This is a first step in Quine's rejection of synonymous sentences. He goes on to raise the problem of renate/cordate. Presumably any two word types can have different connotations, and hence not always be interchangeable - in poetry, for example.
'Renate' and 'cordate' have identical extensions, but are not synonymous [Quine, by Miller,A]
     Full Idea: It is easy to see that intersubstitutability salva veritate is not a sufficient condition for synonymy. 'Renate' (with kidney) and 'cordate' (with heart) can be substituted in a purely extensional language, but are plainly not synonymous.
     From: report of Willard Quine (Two Dogmas of Empiricism [1953]) by Alexander Miller - Philosophy of Language 4.2
     A reaction: This seems to be a key example (along with Hesperus, and many others) in mapping out synonymy, meaning, analyticity, sense, reference, extension, intension, and all that stuff.
If we give up synonymy, we have to give up significance, meaning and sense [Grice/Strawson]
     Full Idea: If we are to give up the notion of sentence-synonymy as senseless, we must give up the notion of sentence-significance (of a sentence having meaning) as senseless too. But then perhaps we might as well give up the notion of sense.
     From: P Grice / P Strawson (In Defense of a Dogma [1956]), quoted by Alexander Miller - Philosophy of Language 4.2
     A reaction: This is very prescient. Nearly all American philosophers seem to embrace Quine's view of analyticity (the philosophical equivalent of Americans putting a man on the moon?), but have they digested the implications (which Quine later largely admits)?
There is only similarity in meaning, never sameness in meaning [Harman]
     Full Idea: The only sort of sameness of meaning we know is similarity in meaning, not exact sameness of meaning.
     From: Gilbert Harman (Thought [1973], 6.8)
     A reaction: The Eiffel Tower and le tour Eiffel? If you want to be difficult, you can doubt whether the word 'fast' ever has exactly the same meaning in two separate usages of the word.
Sentences might have the same sense when logically equivalent - or never have the same sense [Kaplan]
     Full Idea: Among the proposals for conditions under which two sentences have the same ordinary sense, the most liberal (Carnap and Church) is that they be logically equivalent, and the most restrictive (Benson Mates) is that they never have the same sense.
     From: David Kaplan (Transworld Heir Lines [1967], p.89)
     A reaction: Personally I would move the discussion to the level of the propositions being expressed before I attempted a solution.
Mental states may have the same content but different extensions [Fodor]
     Full Idea: The identity of the content of mental states does not ensure the identity of their extensions.
     From: Jerry A. Fodor (Psychosemantics [1987], p. 45)
     A reaction: Obviously if I am thinking each day about 'my sheep', that won't change if I am unaware that one of them died this morning. …Because I didn’t have the precise number of sheep in mind.
Externalist synonymy is there being a correct link to the same external phenomena [Rey]
     Full Idea: Externalists are typically committed to counting expressions as 'synonymous' if they happen to be linked in the right way to the same external phenomena, even if a thinker couldn't realise that they are by reflection alone.
     From: Georges Rey (The Analytic/Synthetic Distinction [2013], 4.2)
     A reaction: [He cites Fodor] Externalists always try to link to concrete things in the world, but most of our talk is full of generalities, abstractions and fiction which don't link directly to anything.
Could expressions have meaning, without two expressions possibly meaning the same? [Boghossian]
     Full Idea: Could there be a fact of the matter about what each expression means, but no fact of the matter about whether they mean the same?
     From: Paul Boghossian (Analyticity Reconsidered [1996], §II)
     A reaction: He is discussing Quine's attack on synonymy, and his scepticism about meaning. Boghossian and I believe in propositions, so we have no trouble with two statements having the same meaning. Denial of propositions breeds trouble.