Combining Texts

Ideas for 'Chomsky on himself', 'Philosophy of Mathematics' and 'On the Source of Necessity'

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2 ideas

4. Formal Logic / D. Modal Logic ML / 1. Modal Logic

10206

Modal operators are usually treated as quantifiers [Shapiro]

4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / g. System S4

15102

S4 says there must be some necessary truths (the actual ones, of which there is at least one) [Cameron]