4 ideas
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 15716 | If axioms and their implications have no contradictions, they pass my criterion of truth and existence [Hilbert] |
| 16456 | For modality Lewis rejected boxes and diamonds, preferring worlds, and an index for the actual one [Lewis, by Stalnaker] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |