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.


(P1): T ⊃ (U ⋅ V)
(P2): U ⊃ (W ⋅ X)
(P3): (T ⊃ W) ⊃ (Y ≡ Z)
(P4): (T ⊃ U) ⊃ ~ Y
(P5): ~ Y ⊃ (~ Z ⊃ X)
∴ X

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Introduction To Logic

ISBN: 9781138500860

15th Edition

Authors: Irving M. Copi, Carl Cohen, Victor Rodych

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