Question

Define an argument prove disprove the argument is valid

Answer 1

A deductive argument is said to bevalid if and only if it takes a form that makes it impossible for the premises to be true and the conclusion nevertheless to be false. ... In effect, anargument is valid if the truth of the premises logically guarantees the truth of the conclusion.

Answer 2

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Valid: an argument is valid if and only if it is necessary that if all of the premises are true, then the conclusion is true; if all the premises are true, then the conclusion must be true; it is impossible that all the premises are true and the conclusion is false.