3 ideas
18946 | Unreflectively, we all assume there are nonexistents, and we can refer to them [Reimer] |
13007 | Archimedes defined a straight line as the shortest distance between two points [Archimedes, by Leibniz] |
8249 | Class membership is not transitive, unlike being part of a part of the whole [Lesniewski, by George/Van Evra] |