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Ideas for 'Explaining the A Priori', 'Reference and Modality' and 'Introduction to Mathematical Philosophy'

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2 ideas

10. Modality / E. Possible worlds / 1. Possible Worlds / a. Possible worlds

14460

If something is true in all possible worlds then it is logically necessary [Russell]

10. Modality / E. Possible worlds / 3. Transworld Objects / a. Transworld identity

9203	We can't quantify in modal contexts, because the modality depends on descriptions, not objects [Quine, by Fine,K]