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Ideas for 'works', 'works' and 'Philosophical Logic'

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2 ideas

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

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