4 ideas
18256 | Quantity is inconceivable without the idea of addition [Frege] |
9831 | Geometry appeals to intuition as the source of its axioms [Frege] |
7566 | The Identity of Indiscernibles is really the same as the verification principle [Jolley] |
4577 | There is no necessity higher than natural necessity, and that is just regularity [Quine] |