5 ideas
17832 | Zermelo showed that the ZF axioms in 1930 were non-categorical [Zermelo, by Hallett,M] |
13028 | Replacement was added when some advanced theorems seemed to need it [Zermelo, by Maddy] |
17626 | The antinomy of endless advance and of completion is resolved in well-ordered transfinite numbers [Zermelo] |
22200 | If you eliminate the impossible, the truth will remain, even if it is weird [Conan Doyle] |
19216 | Propositions (such as 'that dog is barking') only exist if their items exist [Williamson] |