Propositional Logic: Double Negation @PhilosophyFreak
Propositional Logic: Double Negation @PhilosophyFreak
Uploaded February 2013 | Updated September 2026, 3 weeks ago
criticalthinkeracademy.com

This video introduces the concept of the contradictory of the contradictory of a claim, or "not-(not-A)", sometimes called "double negation". It's an example of a substitution rule in propositional logic, where you can always replace "not-(not-A)" with "A".
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Kevin deLaplante |

Propositional Logic: Double Negation

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