The statement pattern $\sim(p \vee q) \vee(\sim p \wedge q)$ is equivalent to

Which of the following is a statement?

Write the negation of the following statement:
All triangles are not equilateral triangles.

If $P$ and $Q$ are two statements,then which of the following compound statements is a tautology?

The expression $((p \wedge q) \vee (p \vee \sim q)) \wedge (\sim p \wedge \sim q)$ is equivalent to

The statements $p, q$ and $r$ have truth values True, False and False respectively. The truth values of a logical statement $[\sim (p \land \sim q) \lor (q \lor \sim r)]$ and its dual are, respectively.....