4 ideas
3299 | In logic identity involves reflexivity (x=x), symmetry (if x=y, then y=x) and transitivity (if x=y and y=z, then x=z) [Baillie] |
594 | Speusippus suggested underlying principles for every substance, and ended with a huge list [Speussipus, by Aristotle] |
2632 | Speusippus said things were governed by some animal force rather than the gods [Speussipus, by Cicero] |
1513 | The Egyptians were the first to say the soul is immortal and reincarnated [Herodotus] |