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] |
22086 | The most important aspect of a human being is not reason, but passion [Kierkegaard, by Carlisle] |
21996 | Freedom only comes when labour is no longer necessary [Marx] |