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<oerjan> le/rn paraconsistent//There has been a lot of work on paraconsistent logics, although there hasn\'t been a lot of work on them.
author HackBot
date Sun, 24 Dec 2017 19:58:10 +0000
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Lambek's Lemma, invented by Joachim "Taneb" Lambek, states that initial algebras have inverses. It can be proved with as few as five arrows.