5 ideas
9283 | Our ancient beliefs can never be overthrown by subtle arguments [Euripides] |
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] |
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
8875 | Sense experiences must have conceptual content, since they are possible reasons for judgements [Brewer,B] |