6 ideas
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 8463 | Maths can be reduced to logic and set theory [Quine] |
| 18521 | The criterion of existence is the possibility of action [Santayana] |
| 8461 | The category of objects incorporates the old distinction of substances and their modes [Quine] |
| 8462 | A hallucination can, like an ague, be identified with its host; the ontology is physical, the idiom mental [Quine] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |