Combining Texts

Ideas for 'fragments/reports', 'The Semantic Conception of Truth' and 'A Theory of Universals'

expand these ideas     |    start again     |     choose another area for these texts

display all the ideas for this combination of texts

---

2 ideas

4. Formal Logic / B. Propositional Logic PL / 3. Truth Tables

19195

Truth tables give prior conditions for logic, but are outside the system, and not definitions [Tarski]

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]