Counterexample

One case that shows an "all" claim is false, or a case where an argument's reasons are true and its conclusion false. One is enough.

Depth 1 · Foundation

You can find a counterexample to an "all" claim, know one is enough, and use an imagined case to show a conclusion doesn't follow.

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1
Foundation
You can find a counterexample to an "all" claim, know one is enough, and use an imagined case to show a conclusion doesn't follow.
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ValidityA counterexample to an argument is exactly what the test for validity looks for: true reasons with a false conclusion.

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What's still between you and Counterexample, depth 1, in the order you can learn it.

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ValidityA counterexample to an argument is exactly what the test for validity looks for: true reasons with a false conclusion.

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