5 ideas
18946 | Unreflectively, we all assume there are nonexistents, and we can refer to them [Reimer] |
6408 | Russell needed three extra axioms to reduce maths to logic: infinity, choice and reducibility [Grayling] |
15990 | Every individual thing which exists has an essence, which is its internal constitution [Locke] |
15994 | If it is knowledge, it is certain; if it isn't certain, it isn't knowledge [Locke] |
6414 | Two propositions might seem self-evident, but contradict one another [Grayling] |