Philosophy Dictionary of ArgumentsHome
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| Ex falso quodlibet: Ex falso quodlibet (EFQ) is a rule of logic that states that from a contradiction, anything follows. See also Contradiction, Consequence, Inferene, Implication, Logic, Truth values._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. | |||
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Logic Texts on Ex falso quodlibet/EFQ - Dictionary of Arguments
Sainsbury V 200 EFQ/ex falso quodlibet/Sainsbury : this is no problem at all for the classical logician, because no contradiction is true! Even if the arguments are classically valid, they are not conclusive. We could never use them to deduce anything because we could never prove the premises. As soon as even one true contradiction is allowed, the absurd consequence would be that all statements are true. >Implication, >Paradox of implication, >Strict implication. Dialethism: The dialethists therefore reject the classical rule of inference. >Dialethism. It is surprising how little is lost by this modification of classical logic. EFQ/Classical Logic: an argument whose premises contain a contradiction is an argument whose premises cannot all be true, and thus one that excludes the possibility that the argument leads from truth to falsity. EFQ/Dialethism: does not assume that a contradiction cannot be true and therefore is not forced to consider that every conclusion with a contradiction is valid under the premises. >Contradiction, >Dialethism, >Bivalence._____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution. Translations: Dictionary of Arguments The note [Concept/Author], [Author1]Vs[Author2] or [Author]Vs[term] resp. "problem:"/"solution:", "old:"/"new:" and "thesis:" is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition. |
Logic Texts Me I Albert Menne Folgerichtig Denken Darmstadt 1988 HH II Hoyningen-Huene Formale Logik, Stuttgart 1998 Re III Stephen Read Philosophie der Logik Hamburg 1997 Sal IV Wesley C. Salmon Logic, Englewood Cliffs, New Jersey 1973 - German: Logik Stuttgart 1983 Sai V R.M.Sainsbury Paradoxes, Cambridge/New York/Melbourne 1995 - German: Paradoxien Stuttgart 2001 Sai I R.M. Sainsbury Paradoxes, Cambridge/New York/Melbourne 1995 German Edition: Paradoxien Stuttgart 1993 |
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Ed. Martin Schulz, access date 2024-04-29