13 ideas
| 2661 | Dialectic is speech cast in the form of logical argument [Cicero] |
| 2673 | There cannot be more than one truth [Cicero] |
| 2669 | Dialectic assumes that all statements are either true or false, but self-referential paradoxes are a big problem [Cicero] |
| 17644 | Metaphysical realism is committed to there being one ultimate true theory [Putnam] |
| 17648 | It is an illusion to think there could be one good scientific theory of reality [Putnam] |
| 17643 | Shape is essential relative to 'statue', but not essential relative to 'clay' [Putnam] |
| 2664 | If we have complete healthy senses, what more could the gods give us? [Cicero] |
| 17642 | The old view that sense data are independent of mind is quite dotty [Putnam] |
| 2665 | How can there be a memory of what is false? [Cicero] |
| 20800 | Every true presentation can have a false one of the same quality [Cicero] |
| 5845 | Niceratus learnt the whole of Homer by heart, as a guide to goodness [Xenophon] |
| 2672 | Virtues must be very detached, to avoid being motivated by pleasure [Cicero] |
| 17645 | An alien might think oxygen was the main cause of a forest fire [Putnam] |