Combining Texts

All the ideas for 'Action, Intention and Reason', 'Mathematics and Indispensibility' and 'Counterparts and Identity'

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7 ideas

4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula

18823

To say there could have been people who don't exist, but deny those possible things, rejects Barcan [Stalnaker, by Rumfitt]

7. Existence / D. Theories of Reality / 11. Ontological Commitment / e. Ontological commitment problems

9558	All scientific tests will verify mathematics, so it is a background, not something being tested [Sober]

10. Modality / E. Possible worlds / 3. Transworld Objects / c. Counterparts

16409

Unlike Lewis, I defend an actualist version of counterpart theory [Stalnaker]

16411

If possible worlds really differ, I can't be in more than one at a time [Stalnaker]

16412

If counterparts exist strictly in one world only, this seems to be extreme invariant essentialism [Stalnaker]

19. Language / C. Assigning Meanings / 8. Possible Worlds Semantics

16410

Extensional semantics has individuals and sets; modal semantics has intensions, functions of world to extension [Stalnaker]

20. Action / C. Motives for Action / 3. Acting on Reason / c. Reasons as causes

20064

Actions are not mere effects of reasons, but are under their control [Audi,R]