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] |
12723 | The most primitive thing in substances is force, which leads to their actions and dispositions [Leibniz] |
17593 | Always be ready to give reasons for your beliefs [Peter] |