5 ideas
21757 | Philosophy is the conceptual essence of the shape of history [Hegel] |
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] |
12468 | A state of affairs is only possible if there has been an actual substance to initiate it [Pruss] |