5 ideas
22077 | Metaphysics is the lattice which makes incoming material intelligible [Hegel] |
9565 | Zermelo made 'set' and 'member' undefined axioms [Zermelo, by Chihara] |
3339 | For Zermelo's set theory the empty set is zero and the successor of each number is its unit set [Zermelo, by Blackburn] |
8638 | Thomae's idea of abstract from peculiarities gives a general concept, and leaves the peculiarities [Frege on Thomae] |
21756 | All revolutions result from spirit changing its categories, to achieve a deeper understanding [Hegel] |