SOLUTION: Please complete the following natural deduction proof.
1. A ⊃ U
/ A ⊃ (K ⊃ U)
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Question 1029581: Please complete the following natural deduction proof.
1. A ⊃ U
/ A ⊃ (K ⊃ U)
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
1. A ⊃ U ------------------Hypothesis
2. ~A v U -------------------Material implication
3. (~A v U) v (~K) ----------Disjunctive amplification
4. ~A v (U v ~K)-------------Associativity
5. ~A v (~KvU) --------------Commutativity
6. A ⊃ (K ⊃ U) ------------Material implication (twice)
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