Combining Texts

Ideas for 'Works of Love', 'A Theory of Universals' and 'Ontology and the Vicious Circle Principle'

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2 ideas

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

15544

If what is actual might have been impossible, we need S4 modal logic [Armstrong, by Lewis]

4. Formal Logic / F. Set Theory ST / 8. Critique of Set Theory

18151

Could we replace sets by the open sentences that define them? [Chihara, by Bostock]