To prove by contradiction, you assume that an opposite assumption is true, then disprove the opposite statement.
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Contradiction or indirect proof.
Yes. It is a theorem. To prove it, use contradiction.
Proof by contradiction (APEX)
The term that best describes a proof in which you assume the opposite of what you want to prove is 'indirect proof'.
TrueIt is true that the body of an indirect proof you must show that the assumption leads to a contradiction. In math a proof is a deductive argument for a mathematical statement.