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] |
19216 | Propositions (such as 'that dog is barking') only exist if their items exist [Williamson] |
16591 | Prime matter is nothing but its parts [Vanini] |