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Consider the argument ax P(x) ax OX :3x (Q(x) ? P(x)) What is the flaw in the following proof of the argument? 1. 3x Px)
Consider the argument ax P(x) ax OX :3x (Q(x) ? P(x)) What is the flaw in the following proof of the argument? 1. 3x Px) 2. P(c) for some c 3. 3x Q(x) 4. Q(c) for some c 5. P(c) A Q(c) 6. 3x (Q(x) ? P(x)) Hypothesis Existential Instantiation Hypothesis Existential Instantiation Conjunction Existential Generalization
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1 2 3 Data Base Techniques
Authors: Dick Andersen
1st Edition
0880223464, 978-0880223461
