The validity of an argument’s form and the truth of its premises are different questions. “All A are B; all B are C; therefore all A are C” has a valid structure. If a premise is false or unverified, the structure alone does not establish the conclusion as a fact. This distinction is an explanatory logical qualification.
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Valid form versus true premises
Kinds of Argument: Syllogism, Premises, Conclusion and Three Terms
The validity of an argument’s form and the truth of its premises are different questions. “All A are B; all B are C; therefore all A are C” has a valid structure. If a premise is false or unverified, the structure alone does not establish the conclusion as a fact. This distinction is an explanatory logical qualification.