Combining Philosophers

All the ideas for Hermarchus, Robin Waterfield and Joan Weiner

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3 ideas

4. Formal Logic / B. Propositional Logic PL / 1. Propositional Logic

7726	Aristotelian logic dealt with inferences about concepts, and there were also proposition inferences [Weiner]

6. Mathematics / C. Sources of Mathematics / 10. Constructivism / b. Intuitionism

9548	A mathematical object exists if there is no contradiction in its definition [Waterfield]

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]