Combining Philosophers

All the ideas for Anon (Lev), Hilbert,D/Ackermann,W and Robin Waterfield

expand these ideas     |    start again     |     specify just one area for these philosophers

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3 ideas

4. Formal Logic / C. Predicate Calculus PC / 1. Predicate Calculus PC

17750

The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki]

6. Mathematics / C. Sources of Mathematics / 10. Constructivism / b. Intuitionism

9548	A mathematical object exists if there is no contradiction in its definition [Waterfield]

22. Metaethics / B. Value / 2. Values / g. Love

19941

Thou shalt love thy neighbour as thyself [Anon (Leviticus)]