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

Which of the following is the negation of the statement "for all $M > 0$,there exists $x \in S$ such that $x \geq M$"?

Write the negation of the following statement and check whether the resulting statement is true:
There does not exist a quadrilateral which has all its sides equal.

Negation of the Boolean statement $(p \vee q) \Rightarrow ((\sim r) \vee p)$ is equivalent to

Which of the following statements is true?

The contrapositive of the statement: "If the weather is fine then my friends will come and we go for a picnic." is