8 ideas
8000 | He who is ignorant of the history of philosophy is doomed to repeat it [Santayana, by MacIntyre] |
17833 | The first-order ZF axiomatisation is highly non-categorical [Hallett,M] |
17834 | Non-categoricity reveals a sort of incompleteness, with sets existing that the axioms don't reveal [Hallett,M] |
17837 | Zermelo allows ur-elements, to enable the widespread application of set-theory [Hallett,M] |
17836 | The General Continuum Hypothesis and its negation are both consistent with ZF [Hallett,M] |
18521 | The criterion of existence is the possibility of action [Santayana] |
23060 | The good is not relative, but is rooted in facts about human needs [Santayana] |
1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |