4 ideas
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] |
13479 | Given that thinking aims at truth, logic gives universal rules for how to do it [Burge] |
20329 | A work of art is an artifact created for the artworld [Dickie] |