Combining Philosophers

All the ideas for Saunders MacLane, Robert Geroch and Jan-Erik Jones

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3 ideas

2. Reason / D. Definition / 4. Real Definition

16030

'Nominal' definitions identify things, but fail to give their essence [Jones,J-E]

4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / a. Axioms for sets

18189

ZFC could contain a contradiction, and it can never prove its own consistency [MacLane]

18. Thought / E. Abstraction / 3. Abstracta by Ignoring

9567	Maths deals with quantities of physical significance, ignoring irrelevant features [Geroch]