soundness

logic

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July 14, 2026

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In logic, validity refers to an argument where true premises guarantee a true conclusion due to the argument's structure. This means if the premises are true, the conclusion must be true. Arguments that fail this test are considered fallacies.123

A sound argument meets two conditions: its premises are true, and its conclusion logically follows from those premises. If an argument is valid but has false premises, it is not sound. Fallacies can arise from errors in material content, wording, or structure.2453

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formal logic
General observations
…both these conditions is called sound. Of these two conditions, the logician as such is concerned only with the first; the second, the determination of the truth or falsity of the premises, is the task of some special discipline or of common observation appropriate to the subject matter of the…
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…both these conditions is called sound. Of these two conditions, the logician as such is concerned only with the first; the second, the determination of the truth or falsity of the premises, is the task of some special discipline or of common observation appropriate to the subject matter of the…
Read More