7 ideas
| 16978 | If conceivability is a priori coherence, that implies possibility [Tahko] |
| 9155 | An a priori proof is independent of experience [Leibniz] |
| 16975 | Essences are used to explain natural kinds, modality, and causal powers [Tahko] |
| 1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
| 16976 | Scientific essentialists tend to characterise essence in terms of modality (not vice versa) [Tahko] |
| 16977 | If essence is modal and laws are necessary, essentialist knowledge is found by scientists [Tahko] |
| 5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |