5 ideas
| 594 | Speusippus suggested underlying principles for every substance, and ended with a huge list [Speussipus, by Aristotle] |
| 22352 | Out of more than a hundred planets, Earth is the only one with the idea of free will [Vonnegut] |
| 4051 | People will volunteer for euthanasia because they think other people want them dead [Kamisar] |
| 4050 | We only allow voluntary euthanasia to someone who is both sane and crazed by pain [Kamisar] |
| 2632 | Speusippus said things were governed by some animal force rather than the gods [Speussipus, by Cicero] |