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|Natural Kinds||I 11
Properties/Kind/Millikan: propoerties exist only in the actual world (our real world).
Natural kinds/Putnam/Millikan: Thesis: at least in the case of natural kind-concepts, the intension does not determine the extension.
Reason: it is possible that such concepts have identical intensions but different extensions.
Meaning/Putnam: whatever has different extensions, must have different meanings. Therefore, meanings cannot be in the head.
Putnam/Millikan: his argumentation here is that of a realist.
Meaning/Millikan: if meanings are not intensions, there must be something else that can determine the reference or the extension.
Natural kind/solution/Putnam: contrary to the appearance natural kind-concepts are indexical. And tradition has always had its difficulties with this.
Extension/Putnam: Thesis: the extension of "water" and "gold" is determined by a relation between the expression token and the extension.
MillikanVsPutnam: that is the reason why he mistakenly thinks that natural kind-concepts are indexical. No problem is solved, but only one is named.
R. G. Millikan
Language, Thought, and Other Biological Categories: New Foundations for Realism Cambridge 1987