more from this thinker | more from this text
Full Idea
Theoretical identities, according to the conception I advocate, are generally identities involving rigid designators and therefore are examples of the necessary a posteriori.
Clarification
'Rigid designators' are baptismal names
Gist of Idea
Theoretical identities are between rigid designators, and so are necessary a posteriori
Source
Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 3)
Book Ref
Kripke,Saul: 'Naming and Necessity' [Blackwell 1980], p.140
A Reaction
This doesn't open up a huge new realm of a posteriori necessity. We just cured some of our ignorance. I remain unconvinced that the Morning Star is necessarily the Evening Star, except in the boring way that if it is, it is. Venus could fission.
| 8856 | Quine's indispensability argument said arguments for abstracta were a posteriori [Quine, by Yablo] |
| 2796 | For Quine the only way to know a necessity is empirically [Quine, by Dancy,J] |
| 5476 | Essentialists say natural laws are in a new category: necessary a posteriori [Ellis] |
| 9174 | It is necessary that this table is not made of ice, but we don't know it a priori [Kripke] |
| 2408 | Kripke has demonstrated that some necessary truths are only knowable a posteriori [Kripke, by Chalmers] |
| 4960 | "'Hesperus' is 'Phosphorus'" is necessarily true, if it is true, but not known a priori [Kripke] |
| 4966 | Theoretical identities are between rigid designators, and so are necessary a posteriori [Kripke] |
| 14631 | How can you show the necessity of an a posteriori necessity, if it might turn out to be false? [Jackson] |
| 16421 | Critics say there are just an a priori necessary part, and an a posteriori contingent part [Stalnaker] |
| 15171 | The necessary a posteriori is statements either of identity or of essence [Sidelle] |