counter-example
What counter-example means in Mathematics A-Level, as defined for AQA, Pearson Edexcel.
Definitions of counter-example
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Reference: AQA
A permitted example for which a universal statement fails; one is sufficient to disprove that statement.
A single specific case that shows a general statement is false.
Topics that use counter-example
Related terms
- Disproof by counter example
- Irrational Number
- Proof
- Proof by contradiction
- Proof by deduction
- Proof by exhaustion
- Rational Number
- deduction (direct proof)
Using counter-example in the exam
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