Combining Texts

Ideas for 'Through the Looking Glass', 'Causation and Laws of Nature' and 'Anselm and Actuality'

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2 ideas

4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / d. System T

14607

T adds □p→p for reflexivity, and is ideal for modeling lawhood [Schaffer,J]

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

16456

For modality Lewis rejected boxes and diamonds, preferring worlds, and an index for the actual one [Lewis, by Stalnaker]