Combining Philosophers

All the ideas for Hermarchus, Zoroaster and Augustus De Morgan

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7 ideas

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]

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]

29. Religion / B. Monotheistic Religion / 1. Monotheistic Religion

7598	Zoroaster and the Hebrew prophets evolved different versions of monotheism [Zoroaster, by Armstrong,K]

29. Religion / B. Monotheistic Religion / 3. Zoroastrianism

20672

Zoroastrianism saw the world as a battle between good evil gods [Zoroaster, by Harari]

7472	Zarathustra was the first to present a god who is an abstract concept [Zoroaster]