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17038 | If Hesperus and Phosophorus are the same, they can't possibly be different [Kripke] |
Full Idea: If Hesperus and Phosphorus are one and the same, then in no other possible world can they be different. | |
From: Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 2) | |
A reaction: If we ask whether one object could possibly be two objects, and deny that possibility, then Kripke's novel thought seems just right and obvious. |
17036 | Identity statements can be contingent if they rely on descriptions [Kripke] |
Full Idea: If the man who invented bifocals was the first Postmaster General of the United States - that they were one and the same - it's contingently true. …So when you make identity statements using descriptions, that can be a contingent fact. | |
From: Saul A. Kripke (Naming and Necessity lectures [1970], Lecture 2) |