3 ideas
17750 | The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki] |
19406 | I strongly believe in the actual infinite, which indicates the perfections of its author [Leibniz] |
20328 | A thing is only seen as art in an 'artworld', which has a theory and a history [Danto] |