4 ideas
21757 | Philosophy is the conceptual essence of the shape of history [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] |
6386 | In no important way can psychology be reduced to the physical sciences [Davidson] |