4 ideas
17750 | The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki] |
19393 | What is not active is nothing [Leibniz] |
6003 | Galen showed by experiment that the brain controls the body [Galen, by Hankinson] |
6030 | Each part of the soul has its virtue - pleasure for appetite, success for competition, and rectitude for reason [Galen] |