5 ideas
9879 | NF has no models, but just blocks the comprehension axiom, to avoid contradictions [Quine, by Dummett] |
13432 | The essence of a circle is the equality of its radii [Leibniz] |
2614 | Modern phenomenalism holds that objects are logical constructions out of sense-data [Ayer] |
2615 | The concept of sense-data allows us to discuss appearances without worrying about reality [Ayer] |
12696 | Bodies are recreated in motion, and don't exist in intervening instants [Leibniz] |