4 ideas
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
9138 | An infinite series of sentences asserting falsehood produces the paradox without self-reference [Yablo, by Sorensen] |
20660 | At one level maths and nature are very similar, suggesting some deeper origin [Wolfram] |
20659 | Space and its contents seem to be one stuff - so space is the only existing thing [Wolfram] |