display all the ideas for this combination of texts
4 ideas
7728 | Frege has a judgement stroke (vertical, asserting or judging) and a content stroke (horizontal, expressing) [Frege, by Weiner] |
16881 | The laws of logic are boundless, so we want the few whose power contains the others [Frege] |
9358 | There are several logics, none of which will ever derive falsehoods from truth [Lewis,CI] |
7622 | In 1879 Frege developed second order logic [Frege, by Putnam] |