3 ideas
17750 | The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki] |
9567 | Maths deals with quantities of physical significance, ignoring irrelevant features [Geroch] |
1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |