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17378 | Presumably molecular structure seems important because we never have the Twin Earth experience [Dupré] |
Full Idea: It is surely the absence of experiences like the one Putnam describes that makes it reasonable to attach to molecular structure at least most of the importance that Putnam ascribes to it. | |
From: John Dupré (The Disorder of Things [1993], 1) | |
A reaction: That is, whenever we experience water-like stuff, it always turns out to have the same molecular structure. Twin Earth is a nice thought experiment, except that XZY is virtually inconceivable. |