Combining Philosophers

Ideas for Charles Parsons, Michael D. Resnik and John P. Burgess

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3 ideas

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

9470	Modal logic is not an extensional language [Parsons,C]

4. Formal Logic / D. Modal Logic ML / 6. Temporal Logic

15413

With four tense operators, all complex tenses reduce to fourteen basic cases [Burgess]

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

15415

The temporal Barcan formulas fix what exists, which seems absurd [Burgess]