3 ideas
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
9558 | All scientific tests will verify mathematics, so it is a background, not something being tested [Sober] |
19423 | By an 'idea' I mean not an actual thought, but the resources we can draw on to think [Leibniz] |