4 ideas
17744 | De Morgan started the study of relations and their properties [De Morgan, by Walicki] |
13501 | De Morgan found inferences involving relations, which eluded Aristotle's syllogistic [De Morgan, by Hart,WD] |
1556 | By nature people are close to one another, but culture drives them apart [Hippias] |
22456 | Maybe virtues conflict with each other, if some virtue needs a vice for its achievement [Foot] |