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Ideas for 'Reference and Modality', 'Constructibility and Mathematical Existence' and 'The Concept of Logical Consequence'

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2 ideas

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

10928

Maybe we can quantify modally if the objects are intensional, but it seems unlikely [Quine]

4. Formal Logic / F. Set Theory ST / 8. Critique of Set Theory

8758	We could talk of open sentences, instead of sets [Chihara, by Shapiro]