4 ideas
17750 | The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki] |
22329 | Logic is highly general truths abstracted from reality [Russell, by Glock] |
21569 | It is good to generalise truths as much as possible [Russell] |
22511 | Some reasonings are stronger than we are [Philolaus] |