\[\tilde{\ }(p\Rightarrow q)\Leftrightarrow \tilde{\ }p\vee \tilde{\ }

1.	\[\tilde{\ }(p\Rightarrow q)\Leftrightarrow \tilde{\ }p\vee \tilde{\ }q\] is
A.	A tautology
B.	A contradiction
C.	Neither a tautology nor a contradiction
D.	Cannot come to any conclusion
Answer» D. Cannot come to any conclusion

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\[\tilde{\ }(p\Rightarrow q)\Leftrightarrow \tilde{\ }p\vee \tilde{\ }q\] is

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