Statement $\left( {p \wedge q} \right) \to \left( {p \vee q} \right)$ is
contradiction
tautology
neither tautology nor contradiction
can't say
The contrapositive of the statement "I go to school if it does not rain" is
Which of the following is true
The negation of the Boolean expression $x \leftrightarrow \sim y$ is equivalent to
$(p\rightarrow q) \leftrightarrow (q \vee ~ p)$ is
$p \Rightarrow q$ can also be written as