Law of excluded middle:
One of the traditional three laws of thought (along with the laws of identity and contradiction).
Every proposition is either true or not true.
This is weaker than the law of bivalence (every proposition is true or false), since if there is a third truth value excluded middle can still hold, though bivalence will fail. (However, bivalence is sometimes treated as a version of excluded middle).
For classical logic, excluded middle follows from the law of contradiction. Intuitionist logic accepts the latter but not excluded middle (also see: double negation), for reasons connected with the ‘Jones was brave’ example (see bivalence).
Also see: degrees of truth
Source:
P T Geach and W F Bednarowski, “The Law of Excluded Middle’ (symposium), Proceedings of the Aristotelian Society, supplementary volume (1956)
Table of Contents
- 1 Videos
- 2 Related Products
- 2.1 Law Of Excluded Middle
- 2.2 Logic and Discrete Mathematics: A Concise Introduction
- 2.3 When Affirmative Action Was White: An Untold History of Racial Inequality in Twentieth-Century America
- 2.4 The Origins Of Postcommunist Elites: From Prague Spring To The Breakup Of Czechoslovakia (Contradictions of Modernity)
- 2.5 Why Mathematics Lacks Rigor: And all of Infinite Set Theory is Wrong
- 2.6 Notebook: Contradiction , Journal for Writing, College Ruled Size 6" x 9", 110 Pages
Videos
Logic and Discrete Mathematics: A Concise Introduction
- Conradie, Willem (Author)
- English (Publication Language)
- 450 Pages - 06/15/2015 (Publication Date) - Wiley (Publisher)
When Affirmative Action Was White: An Untold History of Racial Inequality in Twentieth-Century America
- Amazon Kindle Edition
- Katznelson, Ira (Author)
- English (Publication Language)
- 253 Pages - 08/17/2006 (Publication Date) - W. W. Norton & Company (Publisher)
The Origins Of Postcommunist Elites: From Prague Spring To The Breakup Of Czechoslovakia (Contradictions of Modernity)
- Used Book in Good Condition
- Eyal, Gil (Author)
- English (Publication Language)
- 272 Pages - 05/21/2003 (Publication Date) - Univ Of Minnesota Press (Publisher)
Why Mathematics Lacks Rigor: And all of Infinite Set Theory is Wrong
- Johri, Mr Pravin K (Author)
- English (Publication Language)
- 84 Pages - 01/21/2018 (Publication Date) - CreateSpace Independent Publishing Platform (Publisher)
Notebook: Contradiction , Journal for Writing, College Ruled Size 6" x 9", 110 Pages
- Notebook, ContradictionizE (Author)
- English (Publication Language)
- 110 Pages - 12/27/2019 (Publication Date) - Independently published (Publisher)
Last update 2020-06-17. Price and product availability may change.