Combining Philosophers

Ideas for Rescher,N/Oppenheim,P, Theodore Sider and Joan Weiner

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3 ideas

5. Theory of Logic / I. Semantics of Logic / 1. Semantics of Logic

13697

Valuations in PC assign truth values to formulas relative to variable assignments [Sider]

5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth

13684

The semantical notion of a logical truth is validity, being true in all interpretations [Sider]

13704

It is hard to say which are the logical truths in modal logic, especially for iterated modal operators [Sider]