For each of the following, either construct a formal proof of validity or prove invalidity by means
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For each of the following, either construct a formal proof of validity or prove invalidity by means of the STTT. In each case, use the notation in parentheses.
If there are the ordinary symptoms of a cold and the patient has a high temperature, then if there are tiny spots on his skin, he has measles. Of course the patient cannot have measles if his record shows that he has had them before. The patient does have a high temperature and his record shows that he has had measles before. Besides the ordinary symptoms of a cold, there are tiny spots on his skin. I conclude that the patient has a viral infection. (O, T, S, M, R, V)
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1 O T S M 2 R M 3 T R 4 O S V 5 O 4 Simp 6 T 3 S...View the full answer
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Related Book For 
Introduction To Logic
ISBN: 9781138500860
15th Edition
Authors: Irving M. Copi, Carl Cohen, Victor Rodych
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