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- Disprove a mathematical statementProof by counterexample is a technique used to disprove a mathematical statement12. It involves finding one example where the statement isn't true, which is called a counterexample1. A proof by counterexample is not technically a proof, but it is a way of showing that a given statement cannot possibly be correct by showing an instance that contradicts a universal statement3. Counterexamples are often used to prove the boundaries of possible theorems4.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.Showing that a mathematical statement is true requires a formal proof. However, showing that a mathematical statement is false only requires finding one example where the statement isn't true. Such an example is called a counterexample because it's an example that counters, or goes against, the statement's conclusion.www.khanacademy.org/test-prep/praxis-math/praxi…Such a statement Y Y is referred to as a counterexample to X X. Proving, or disproving, a statement in the form of X X by establishing the truth or falsehood of a statement in the form of Y Y is known as the technique of proof by counterexample.proofwiki.org/wiki/Proof_by_CounterexampleA proof by counterexample is not technically a proof. It is merely a way of showing that a given statement cannot possibly be correct by showing an instance that contradicts a universal statement.en.wikibooks.org/wiki/Mathematical_Proof/Methods…In mathematics, counterexamples are often used to prove the boundaries of possible theorems. By using counterexamples to show that certain conjectures are false, mathematical researchers can then avoid going down blind alleys and learn to modify conjectures to produce provable theorems.en.wikipedia.org/wiki/Counterexample
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