5 ideas
23123 | Basic to human culture are binary oppositions, such as eating raw or cooked [Levi-Strauss, by Green,TH] |
9565 | Zermelo made 'set' and 'member' undefined axioms [Zermelo, by Chihara] |
3339 | For Zermelo's set theory the empty set is zero and the successor of each number is its unit set [Zermelo, by Blackburn] |
19043 | Bivalence applies not just to sentences, but that general terms are true or false of each object [Quine] |
19042 | Terms learned by ostension tend to be vague, because that must be quick and unrefined [Quine] |