\[(p\wedge \tilde{\ }q)\wedge (\tilde{\ }p\wedge q)\] is

1.	\[(p\wedge \tilde{\ }q)\wedge (\tilde{\ }p\wedge q)\] is
A.	A tautology
B.	A contradiction
C.	Both a tautology and a contradiction
D.	Neither a tautology nor a contradiction
Answer» C. Both a tautology and a contradiction

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\[(p\wedge \tilde{\ }q)\wedge (\tilde{\ }p\wedge q)\] is

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