3 ideas
8249 | Class membership is not transitive, unlike being part of a part of the whole [Lesniewski, by George/Van Evra] |
13166 | Essences are no use in mathematics, if all mathematical truths are necessary [Mancosu] |
19699 | A Gettier case is a belief which is true, and its fallible justification involves some luck [Hetherington] |