If an argument form is expressed as a conditional (with the conclusion as the consequent and a conjunction of the premises as the antecedent), and it shows one row on its truth table where Ts appear under the premises but an F appears under the conclusion, it may still be valid

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An argument form expressed this way is considered valid only if there is no possible situation (row in the truth table) where the premises are all true (T) and the conclusion is false (F). If such a row exists, the argument form is invalid.

If an Argument Form Is Expressed as a Conditional (With