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Full Idea
Reference via sense solves Frege's four puzzles, of the informativeness of identity statements, the failure of substitutivity in attitude contexts, of negative existentials, and the truth-value of statements using nondenoting singular terms.
Gist of Idea
Frege's 'sense' solves four tricky puzzles
Source
Nathan Salmon (Reference and Essence (1st edn) [1981], 1.1.1)
Book Ref
Salmon,Nathan: 'Reference and Essence (2nd ed)' [Prometheus 2005], p.11
A Reaction
These must then be compared with Kripke's three puzzles about referring via sense, and the whole debate is then spread before us.
18886 | Frege's 'sense' solves four tricky puzzles [Salmon,N] |
18887 | The perfect case of direct reference is a variable which has been assigned a value [Salmon,N] |
14627 | S4, and therefore S5, are invalid for metaphysical modality [Salmon,N, by Williamson] |
18888 | Essentialism says some properties must be possessed, if a thing is to exist [Salmon,N] |
18889 | Ostensive definitions needn't involve pointing, but must refer to something specific [Salmon,N] |
18891 | Nothing in the direct theory of reference blocks anti-essentialism; water structure might have been different [Salmon,N] |