Combining Texts

All the ideas for 'Elements of Mathematical Logic', 'On the Syllogism IV' and 'The Tragic Sense of Life'

expand these ideas     |    start again     |     specify just one area for these texts

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4 ideas

4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic

8942	Lukasiewicz's L3 logic has three truth-values, T, F and I (for 'indeterminate') [Lukasiewicz, by Fisher]

5. Theory of Logic / E. Structures of Logic / 6. Relations in Logic

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]

24. Political Theory / A. Basis of a State / 1. A People / a. Human distinctiveness

20740

Maybe humans are distinguished from other animals by feelings, rather than reason [Unamuno]