7 ideas
| 11074 | 'It is true that this follows' means simply: this follows [Wittgenstein] |
| 10594 | Henkin semantics is more plausible for plural logic than for second-order logic [Maddy] |
| 11073 | Two and one making three has the necessity of logical inference [Wittgenstein] |
| 1554 | Contradiction is impossible, since only one side of the argument refers to the true facts [Prodicus, by Didymus the Blind] |
| 1555 | People used to think anything helpful to life was a god, as the Egyptians think the Nile a god [Prodicus] |
| 535 | The gods are just personified human benefits [Prodicus] |
| 1543 | He denied the existence of the gods, saying they are just exaltations of things useful for life [Prodicus] |