an argument for a proposition that shows its negation to be incompatible with a previously accepted or established premise.
Direct Questions vs. Reported DialogueA direct question is when you ask a question by speaking directly (e.g. “How are you doing today?”). Reported dialogue is when you report what someone else says (e.g. “Joan asked how you’re doing today.”). Reported dialogue usually uses the third person point of view. Direct Questions Direct questions usually include interrogative pronouns or adverbs. Interrogative pronouns and adverbs include words like as who, what, …
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British Dictionary definitions for indirect proof
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 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012