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] |
9413 | An event is a change in or to an object [Lombard, by Mumford] |
468 | Musical performance can reveal a range of virtues [Damon of Ath.] |