3 ideas
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
16668 | Modes of things exist in some way, without being full-blown substances [Gassendi] |
19216 | Propositions (such as 'that dog is barking') only exist if their items exist [Williamson] |