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the claim

An invalid argument can have true premises and a true conclusion

the verdict
COMMON KNOWLEDGE
Legacy classification; evidence review pending
Recorded sources
no sources on either side

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Is it true that an invalid argument can have true premises and a true conclusion?

By definition in formal logic, validity only guarantees that if the premises are true, the conclusion must be true; however, invalid arguments can independently feature any combination of truth values for their premises and conclusions, making this a basic conceptual truism requiring no citation.

Verdict: COMMON KNOWLEDGE · 0 sources for, 0 against · Last checked

The analysis

The claim states a fundamental definition from introductory logic: an invalid argument has no structural guarantee of truth preservation, meaning its premises and conclusion can take any combination of truth values (including true premises and a true conclusion). This is a matter of basic definition rather than empirical investigation, making it common knowledge in logic, so no paper citation is needed or applicable.

What does the evidence say?

The claim states a fundamental definition from introductory logic: an invalid argument has no structural guarantee of truth preservation, meaning its premises and conclusion can take any combination of truth values (including true premises and a true conclusion). This is a matter of basic definition rather than empirical investigation, making it common knowledge in logic, so no paper citation is needed or applicable.

Receipt History
first checked04 Aug 2026
judged → COMMON KNOWLEDGE · 9504 Aug 2026
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