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Single Idea 14200

[filed under theme 18. Thought / C. Content / 5. Twin Earth ]

Full Idea

The word 'water' used on Twin Earth refers not to water but to this other liquid (XYZ). Yet there is no relevant difference in the mental state of Twin Earth speakers and speakers on Earth (in 1750) to account for this difference of reference.

Gist of Idea

'Water' on Twin Earth doesn't refer to water, but no mental difference can account for this

Source

Hilary Putnam (Reason, Truth and History [1981], Ch.2)

Book Ref

Putnam,Hilary: 'Reason, Truth and History' [CUP 1998], p.23

A Reaction

In this world, if you and I separately meet twins, and I think about this twin while you think about that one, our mental states are different even if they are indistinguishable. I know I'm thinking about my twin, not yours. Indexicals.

The 22 ideas from 'Reason, Truth and History'

4714 Putnam's epistemic notion of truth replaces the realism of correspondence with ontological relativism [Putnam, by O'Grady]
4716 The correspondence theory is wrong, because there is no one correspondence between reality and fact [Putnam, by O'Grady]
14214 If we try to cure the abundance of theories with causal links, this is 'just more theory' [Putnam, by Lewis]
4718 If necessity is always relative to a description in a language, then there is only 'de dicto' necessity [Putnam, by O'Grady]
7624 The word 'inconsiderate' nicely shows the blurring of facts and values [Putnam]
7610 A fact is simply what it is rational to accept [Putnam]
7611 Rationality is one part of our conception of human flourishing [Putnam]
7612 Reference is social not individual, because we defer to experts when referring to elm trees [Putnam]
7613 Concepts are (at least in part) abilities and not occurrences [Putnam]
14202 Neither individual nor community mental states fix reference [Putnam]
14201 Maybe the total mental state of a language community fixes the reference of a term [Putnam]
14206 There are infinitely many interpretations of a sentence which can all seem to be 'correct' [Putnam]
14204 Naïve operationalism would have meanings change every time the tests change [Putnam]
14200 'Water' on Twin Earth doesn't refer to water, but no mental difference can account for this [Putnam]
14205 The sentence 'A cat is on a mat' remains always true when 'cat' means cherry and 'mat' means tree [Putnam]
14203 Intension is not meaning, as 'cube' and 'square-faced polyhedron' are intensionally the same [Putnam]
14207 If cats equal cherries, model theory allows reinterpretation of the whole language preserving truth [Putnam]
7616 Truth is an idealisation of rational acceptability [Putnam]
7617 Before Kant, all philosophers had a correspondence theory of truth [Putnam]
7618 Very nominalistic philosophers deny properties, though scientists accept them [Putnam]
7620 Some kind of objective 'rightness' is a presupposition of thought itself [Putnam]
7623 For ancient Greeks being wise was an ethical value [Putnam]