counter-example

the argument seemed sound, but a simple counter-example disproved it.

finding a counter-example is crucial in testing scientific hypotheses.

he tried to defend his claim, but i presented a compelling counter-example.

the professor asked us to look for a counter-example to the theory.

a single counter-example can invalidate a universal statement.

we used a counter-example to demonstrate the flaw in their reasoning.

the logic appeared valid until we discovered a counter-example online.

the student provided a strong counter-example to challenge the assumption.

it's important to consider potential counter-examples when evaluating an argument.

the team searched for a counter-example to the proposed solution.

despite their confidence, a counter-example emerged during the debate.