Combining Philosophers

All the ideas for Hermarchus, Augustus De Morgan and Stephen P. Schwartz

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8 ideas

2. Reason / D. Definition / 1. Definitions

5831	The new view is that "water" is a name, and has no definition [Schwartz,SP]

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]

5. Theory of Logic / F. Referring in Logic / 1. Naming / b. Names as descriptive

5829	We refer to Thales successfully by name, even if all descriptions of him are false [Schwartz,SP]

5830	The traditional theory of names says some of the descriptions must be correct [Schwartz,SP]

5. Theory of Logic / G. Quantification / 2. Domain of Quantification

17743

De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki]

18. Thought / C. Content / 8. Intension

5826	The intension of "lemon" is the conjunction of properties associated with it [Schwartz,SP]

25. Social Practice / F. Life Issues / 6. Animal Rights

6005	Animals are dangerous and nourishing, and can't form contracts of justice [Hermarchus, by Sedley]