Combining Texts

Ideas for 'Two Notions of Being: Entity and Essence', 'The Decline of the West' and 'Mere Possibilities'

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10. Modality / A. Necessity / 3. Types of Necessity

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.