Aristotle on Non-contradiction

[Revised entry by Paula Gottlieb on June 12, 2015. Changes to: Main text, Bibliography] According to Aristotle, first philosophy, or metaphysics, deals with ontology and first principles, of which
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[Revised entry by Paula Gottlieb on June 12, 2015. Changes to: Main text, Bibliography] According to Aristotle, first philosophy, or metaphysics, deals with ontology and first principles, of which the principle (or law) of non-contradiction is the firmest. Aristotle says that without the principle of non-contradiction we could not know anything that we do know. Presumably, we could not demarcate the subject matter of any of the special sciences, for example, biology or mathematics, and we would not be able to distinguish between what something is, for...

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News source: Stanford Encyclopedia of Philosophy

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