Britannica online encyclopedia article on reductio ad absurdum (logic), (Latin: “reduction to absurdity”), in logic, a form of refutation showing contradictory or absurd consequences following upon premises as a matter of logical necessity. ... A form of the reductio ad absurdum argument, known as indirect proof or...
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Reductio ad absurdum is a type of logical argument where one assumes a claim for the sake of argument, arrives at an "absurd" result (often a contradiction), and then concludes that the original assumption must have been wrong, since it led to ... More formally, a reductio ad absurdum argument typically takes the form:
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Reductio ad Hitlerum - Wikipedia, the free encyclopedia
Reductio ad Hitlerum , also argumentum ad Hitlerum , or reductio (or argumentum ) ad Nazium (dog Latin for "reduction or argument to Adolf Hitler or the Nazis") is an ad hom...
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Reductio ad absurdum - Wikipedia, the free encyclopedia
In formal logic, reductio ad absurdum (Latin: "reduction to the absurd") is an argument to refute a proposition (or set of propositions), by showing that it leads to a logically absurd consequence. ...
en.wikipedia.org/wiki/Reductio_ad_absurdum
This is a comparatively weak form of reductio, ... Although a formal contradiction is by definition absurd (unacceptable), a weak reductio ad absurdum argument can be rejected simply by accepting the purportedly absurd conclusion. Such arguments also risk degenerating into strawman arguments, an informal fallacy...
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course, the principle of reductio ad absurdum. " C. I. Lewis and C. H.. Langford, Symbolic Logic. Reductio ad Absurdum is, clearly a valid argument form. ...
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However, this is a weak form of reductio, as the decision to reject the premise requires that the conclusion is accepted as being absurd. Although a formal contradiction is by definition absurd (unacceptable), a weak reductio ad absurdum argument can be rejected simply by accepting the purportedly absurd conclusion.
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As this line of thought indicates, reductio argumentation is a special case of demonstrative reasoning. What we deal with here is an argument of the pattern: From the situation ... J. M. Lee, "The Form of a reductio ad absurdum," Notre Dame Journal of Formal Logic, vol. 14 (1973), pp. 381-86.
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Reductio Ad Absurdum Weblog ... I recently debated the subject with a good friend who deployed an argument against ANWR drilling that I've frequently heard: It's easy for us to support drilling because it's not in our back yard.
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