Sound, Valid, True: Difference between revisions

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"Validity" refers to the chain of reasoning, the logical part of the argument. An argument is valid only if it is impossible for all of the premises to be true and for the conclusion to be false. ''It does not rely on the truth of the premises or of the conclusion.''
 
{{quote|[[All Animals Are Dogs|All animals are dogs.]] (False premise / All A are B.)<br />
All dogs are terriers. (False premise / All B are C.)<br />
Therefore, all animals are terriers. (False conclusion: All animals are not terriers / Valid logic: If all A are B, and all B are C, then all A ''are'' C.) }}