Reductio ad absurdum  

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Train wreck at Montparnasse (October 22, 1895) by Studio Lévy and Sons.
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Train wreck at Montparnasse (October 22, 1895) by Studio Lévy and Sons.

Reductio ad absurdum (Latin: "reduction to the absurd") is a form of argument in which a proposition is disproven by following its implications to a logical but absurd consequence. A particular kind of reductio ad absurdum, in its strictest sense, is proof by contradiction (also called indirect proof) where an assumption is proven false because it leads to a contradiction (for example a proposition of the form ‘p and not-p’).

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Unless indicated otherwise, the text in this article is either based on Wikipedia article "Reductio ad absurdum" or another language Wikipedia page thereof used under the terms of the GNU Free Documentation License; or on original research by Jahsonic and friends. See Art and Popular Culture's copyright notice.

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