A) \[\tilde{\ }[p\vee (\tilde{\ }q)]\equiv (\tilde{\ }p)\wedge q\]
B) \[(p\vee q)\vee (\tilde{\ }q)\]is a tautology
C) \[(p\wedge q)\wedge (\tilde{\ }q)\]is contradiction
D) \[\tilde{\ }[p\wedge (\tilde{\ }p)]\]is a tautology
E) \[\tilde{\ }(p\vee q)\equiv (\tilde{\ }p)\vee (\tilde{\ }q)\]
Correct Answer: E
Solution :
\[\tilde{\ }(p\vee q)\equiv (\tilde{\ }p)\vee (\tilde{\ }q)\]is not true for any two statements p and q.
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