Combining Philosophers

Ideas for Rescher,N/Oppenheim,P, Sarah Sawyer and B Russell/AN Whitehead

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4 ideas

4. Formal Logic / B. Propositional Logic PL / 2. Tools of Propositional Logic / e. Axioms of PL

9542	The best known axiomatization of PL is Whitehead/Russell, with four axioms and two rules [Russell/Whitehead, by Hughes/Cresswell]

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / p. Axiom of Reducibility

21720

Russell saw Reducibility as legitimate for reducing classes to logic [Linsky,B on Russell/Whitehead]

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

10044

Russell denies extensional sets, because the null can't be a collection, and the singleton is just its element [Russell/Whitehead, by Shapiro]

18208

We regard classes as mere symbolic or linguistic conveniences [Russell/Whitehead]