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16466 | Strong necessity is always true; weak necessity is cannot be false [Stalnaker] |
Full Idea: Prior had a strong and a weak reading of necessity, where strong necessity is truth in all possible worlds, while weak necessity is falsity in no possible world. | |
From: Robert C. Stalnaker (Mere Possibilities [2012], 4.3) | |
A reaction: [K.Fine 2005:Ch.9 is also cited] The point of the weak one is that in some worlds there might not exist the proposition which is the candidate for truth or falsehood. |