4. Determine the validity of each of the following arguments. (a) Either John will run or...

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4. Determine the validity of each of the following arguments. (a) Either John will run or Mary will speak. If Mary speaks, then Fred will fly and the moon is purple. The moon is not purple. Thus John will run. (b) If the cow jumps the cat will dance. If the dog barks the cow will jump. The dog will not bark. Thus the cat will not dance. 4. Determine the validity of each of the following arguments. (a) Either John will run or Mary will speak. If Mary speaks, then Fred will fly and the moon is purple. The moon is not purple. Thus John will run. (b) If the cow jumps the cat will dance. If the dog barks the cow will jump. The dog will not bark. Thus the cat will not dance.

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Ans ALet us reduce statements to symbols p be the statement John will run q be the statement mary wi... View the full answer