Combining Philosophers

All the ideas for Gorgias, Augustus De Morgan and Pierre Hadot

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9 ideas

1. Philosophy / D. Nature of Philosophy / 6. Hopes for Philosophy

9198	It is no longer possible to be a sage, but we can practice the exercise of wisdom [Hadot]

2. Reason / A. Nature of Reason / 2. Logos

9197	The logos represents a demand for universal rationality [Hadot]

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 / 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]

7. Existence / A. Nature of Existence / 3. Being / d. Non-being

18933

Not-Being obviously doesn't exist, and the five modes of Being are all impossible [Gorgias, by Diog. Laertius]

19. Language / F. Communication / 1. Rhetoric

5864	Destroy seriousness with laughter, and laughter with seriousness [Gorgias]

9866	Gorgias says rhetoric is the best of arts, because it enslaves without using force [Gorgias, by Plato]

22. Metaethics / C. The Good / 3. Pleasure / b. Types of pleasure

9196	The pleasure of existing is the only genuine pleasure [Hadot]