Combining Philosophers

Ideas for Rescher,N/Oppenheim,P, Anthony Quinton and Dale Jacquette

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3 ideas

4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / a. Systems of modal logic

9456	Modal logic is multiple systems, shown in the variety of accessibility relations between worlds [Jacquette]

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

7689	The modal logic of C.I.Lewis was only interpreted by Kripke and Hintikka in the 1960s [Jacquette]

4. Formal Logic / F. Set Theory ST / 7. Natural Sets

9406	A class is natural when everybody can spot further members of it [Quinton]