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Ideas for 'works', 'Intensions Revisited' and 'Apology of Socrates'

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4. Formal Logic / D. Modal Logic ML / 1. Modal Logic

13591	Quantified modal logic collapses if essence is withdrawn [Quine]
	Full Idea: The whole of quantified modal logic collapses if essence is withdrawn.
	From: Willard Quine (Intensions Revisited [1977], p.121)
	A reaction: Quine offers an interesting qualification to this crushing remark in Idea 13590. The point is that objects must retain their identity in modal contexts, as if I say 'John Kennedy might have been Richard Nixon'. What could that mean?