KnowraPeirce's lawLinked fromLinked fromThe 3 pages that link to Peirce's law, each with the reason it gives.All 3Broader topic 1Related 2Modus ponensRelated: Classical derivations involving this principle can use modus ponens to apply nested conditionals.Charles Sanders PeirceBroader topic: This named logical principle reflects Peirce’s contributions to formal reasoning.Consequentia mirabilisRelated: It is another characteristic classical principle whose intuitionistic failure helps locate consequentia mirabilis.