12 ideas
| 2661 | Dialectic is speech cast in the form of logical argument [Cicero] |
| 15457 | Interdefinition is useless by itself, but if we grasp one separately, we have them both [Lewis] |
| 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] |
| 15400 | We must avoid circularity between what is intrinsic and what is natural [Lewis, by Cameron] |
| 15458 | A property is 'intrinsic' iff it can never differ between duplicates [Lewis] |
| 15459 | Ellipsoidal stars seem to have an intrinsic property which depends on other objects [Lewis] |
| 2664 | If we have complete healthy senses, what more could the gods give us? [Cicero] |
| 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] |
| 16861 | A false theory could hardly rival the explanatory power of natural selection [Darwin] |
| 2672 | Virtues must be very detached, to avoid being motivated by pleasure [Cicero] |