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] |
18521 | The criterion of existence is the possibility of action [Santayana] |
14296 | Dispositions are physical states of mechanism; when known, these replace the old disposition term [Quine] |