5 ideas
| 8463 | Maths can be reduced to logic and set theory [Quine] |
| 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] |
| 20344 | Music is not an expressive art, because it expresses no familiar emotions [Hanslick, by Wollheim] |
| 12709 | Motion is not absolute, but consists in relation [Leibniz] |