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indirect proof
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noun
an argument for a proposition that shows its negation to be incompatible with a previously accepted or established premise.
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Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use indirect proof in a sentence
British Dictionary definitions for indirect proof
indirect proof
noun
logic maths proof of a conclusion by showing its negation to be self-contradictory; reductio ad absurdumCompare direct (def. 17)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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