Justify each step in the following proof sequence of (E
Chapter 1, Problem 7(choose chapter or problem)
Justify each step in the following proof sequence of (E x)[P(x) S Q(x)] S [(4x)P(x) S (E x)Q(x)] 1. (E x)[P(x) S Q(x)] 2. P(a) S Q(a) 3. (4x)P(x) 4. P(a) 5. Q(a) 6. (E x)Q(x)
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