display all the ideas for this combination of texts
3 ideas
18806 | Frege thought traditional categories had psychological and linguistic impurities [Frege, by Rumfitt] |
8309 | A set is a 'number of things', not a 'collection', because nothing actually collects the members [Lowe] |
8322 | I don't believe in the empty set, because (lacking members) it lacks identity-conditions [Lowe] |