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] |
6668 | If the present does not exist, then consciousness must be memory of the immediate past [Marshall] |
12727 | It's impossible, but imagine a body carrying on normally, but with no mind [Leibniz] |