6 ideas
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
16901 | The equivalent algebra model of geometry loses some essential spatial meaning [Burge] |
16902 | Peano arithmetic requires grasping 0 as a primitive number [Burge] |
16616 | Substances 'substand' (beneath accidents), or 'subsist' (independently) [Eustachius] |
16585 | Prime matter is free of all forms, but has the potential for all forms [Eustachius] |
16892 | Is apriority predicated mainly of truths and proofs, or of human cognition? [Burge] |