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The Following Inference Is an Application of Which Rule? ~(X)(y)Axy $\exists$

Question 37

Multiple Choice

The following inference is an application of which rule? ~(x) (y) Axy.Therefore, ( $\exists$ x) ~(y) Axy.

A) quantifier negation
B) universal instantiation
C) existential generalization
D) existential instantiation
E) universal generalization

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