On deductive arguments.
-If an argument has premises that are certainly false and a conclusion that is certainly false, then the argument must be invalid.

Question

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An argument is considered valid if the conclusion logically follows from the premises, regardless of whether the premises or conclusion are actually true or false. Validity concerns the structure of the argument, not the truth value of its elements.

On Deductive Arguments. -If an Argument Has Premises That Are Certainly False and Certainly