The Principle of Contradiction in Aristotle

The Principle of Contradiction in Aristotle

“An absorbing study of logic in flux.” Graham Priest

Follow the young Łukasiewicz in his search for a revolutionary new logic, a Non-Aristotelian logic that does not endorse nor require the Principle of Non-Contradiction in this fascinating study first published in 1910.

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About the Book

For more than two thousand years, Aristotle’s Principle of Non-Contradiction was almost universally accepted as the most certain and best known of all logical and metaphysical principles in Western philosophical thought. Hegel was the first modern philosopher to challenge its validity, but it was not until the emergence of modern analytic philosophy in the late nineteenth and early twentieth century that the truth of the principle became the object of critical analysis and debate. Jan Łukasiewicz’ work on Aristotle and the principle of contradiction, first published in 1910, presents one of the first and truly pioneering investigation into the logical and metaphysical foundations of this principle.

Łukasiewicz applies the newly developed analytic tools of mathematical logic to Aristotle’s seminal defense of the principle in Book IV of the Metaphysics and aims to show that the principle is not nearly as secure as the generally accepted, mostly uncritical, and often dogmatic belief in its universal truth would have it. Łukasiewicz’ goal, however, is far more ambitious than a critical analysis of the principle. He wants to develop a revolutionary new logic, a non-Aristotelian logic, a formally constructed logic that does not include or endorse the principle of contradiction in its Aristotelian conception! As such, his work on Aristotle and the principle of contradiction marks the first step in his search for a new logic that does not entail the consequence of an all-encompassing logical determinism, a search that saw its first success some ten years later with his development of a three-valued propositional calculus in 1920.

Łukasiewicz’ approach to the issues surrounding the Aristotelian conception of the principle of contradiction and its modern descendants is both historical and analytical—it is a sustained and methodical effort to think critically and historically about logic and the foundations of logical inference. The arguments and results that Łukasiewicz develops in his metalogical analysis touch on many topics that are still part of a lively and often inconclusive debate that continues to this day.

Introduction: Jan Lukasiewicz and the Principle of Contradiction by Holger R. Heine

Download your pdf copy of the book's front matter, Foreword by Graham Priest, and Introduction by Holger R. Heine, "Jan Lukasiewicz and the Principle of Contradiction"


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Authors: ,
Genres: History of Logic, Logic, Metaphysics, Philosophy
Tags: Aristotle, Contradiction, Logic, Principle of Non-Contradiction
Publisher: Topos Books
Publication Year: 2021
Format: Paperback
Length: 462 pages
ASIN: 1943354065
ISBN: 9781943354061
List Price: 24.00
This book opens a window on a crucial period in the history of logic. It should be read by anyone interested in that history
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About the Author
Jan Łukasiewicz

Jan Łukasiewicz (1878–1956) was a Polish logician and philosopher. He produced pioneering works in mathematical logic, the history of logic, and the philosophy of logic. He was an innovative thinker who contributed to the understanding of traditional propositional logic, Aristotle’s syllogistic, and foundational principles of logic like the principle of non-contradiction and the law of the excluded third. Among his greatest achievements was the development of one of the first formalized systems of many-valued logic. As a historian of logic, Łukasiewicz approached the history of logic from the standpoint of modern formal logic. He is regarded as one of the most important historians of logic of the twentieth century.

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