display all the ideas for this combination of philosophers
4 ideas
10282 | Logic is the study of sound argument, or of certain artificial languages (or applying the latter to the former) [Hodges,W] |
10478 | Since first-order languages are complete, |= and |- have the same meaning [Hodges,W] |
12376 | Demonstrations by reductio assume excluded middle [Aristotle] |
11033 | Predications of predicates are predications of their subjects [Aristotle] |