4 ideas
10053 | Geometrical axioms imply the propositions, but the former may not be true [Russell] |
18946 | Unreflectively, we all assume there are nonexistents, and we can refer to them [Reimer] |
10052 | Geometry is united by the intuitive axioms of projective geometry [Russell, by Musgrave] |
9471 | Intensions are creatures of darkness which should be exorcised [Quine] |