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] |
| 12716 | The concept of forces or powers best reveals the true concept of substance [Leibniz] |
| 8462 | A hallucination can, like an ague, be identified with its host; the ontology is physical, the idiom mental [Quine] |
| 19216 | Propositions (such as 'that dog is barking') only exist if their items exist [Williamson] |