# Peirce's law

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Peirce's law
The theorem of the propositional calculus stating that ((pq ) →p ) →p .

Philosophy dictionary. . 2011.

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• Peirce's law — in logic is named after the philosopher and logician Charles Sanders Peirce. It was taken as an axiom in his first axiomatisation of propositional logic. In propositional calculus, Peirce s law says that (( P → Q )→ P )→ P . Written out, this… …   Wikipedia

• Peirce's law — noun The classically valid but intuitionistically non valid formula of propositional calculus, which can be used as an substitute for the law of excluded middle in implicational propositional calculus …   Wiktionary

• Law of excluded middle — This article uses forms of logical notation. For a concise description of the symbols used in this notation, see Table of logic symbols. In logic, the law of the excluded middle states that the propositional calculus formula P ∨ ¬ P ( P or not P… …   Wikipedia

• Law of noncontradiction — This article uses forms of logical notation. For a concise description of the symbols used in this notation, see List of logic symbols. In classical logic, the law of non contradiction (LNC) (or the principle of non contradiction (PNC), or the… …   Wikipedia

• Peirce, Charles Sanders — American pragmatism Peirce Cheryl Misak INTRODUCTION Charles Sanders Peirce (1839–1914), one of America’s greatest philosophers, mathematicians, and logicians, was a difficult and not altogether pleasant character. That, combined with what the… …   History of philosophy

• Charles Sanders Peirce bibliography — C. S. Peirce articles  General:    Charles Sanders Peirce Charles Sanders Peirce bibliography Philosophical:    Categories (Peirce) Semiotic elements and   classes of signs (Peirce) Pragmatic maxim • Pragmaticism… …   Wikipedia

• Charles Peirce — Infobox Scientist name = Charles Peirce box width = image size = 200px caption = Charles Peirce birth date = September 10, 1839 birth place = Cambridge, Massachusetts death date = April 19, 1914 death place = residence = citizenship = nationality …   Wikipedia

• Charles Sanders Peirce —  B …   Wikipedia

• Schriften von Charles Sanders Peirce — Das nachfolgende Verzeichnis der Schriften von Charles Sanders Peirce dient als Ergänzung zum Verzeichnis der Werke von Peirce im Hauptartikel. Inhaltsverzeichnis 1 Vorbemerkung 2 Collected Papers 2.1 Vol. I. Principles of Philosophy …   Deutsch Wikipedia

• Charles Peirce — Charles Sanders Peirce um 1870 Charles Sanders Peirce (* 10. September 1839 in Cambridge, Massachusetts; † 19. April 1914 in Milford, Pennsylvania) war ein US amerikanischer Mathematiker …   Deutsch Wikipedia