The proposition $p \Rightarrow \;\sim (p\; \wedge \sim \,q)$ is
Contradiction
A tautology
Either $(a)$ or $(b)$
Neither $(a)$ nor $(b)$
$\sim (p \vee q) \vee (~ p \wedge q)$ is logically equivalent to
Let $\Delta, \nabla \in\{\wedge, \vee\}$ be such that $( p \rightarrow q ) \Delta( p \nabla q )$ is a tautology. Then
Which Venn diagram represent the truth of the statement“Some teenagers are not dreamers”
If the inverse of the conditional statement $p \to \left( { \sim q\ \wedge \sim r} \right)$ is false, then the respective truth values of the statements $p, q$ and $r$ is
Contrapositive of the statement “If two numbers are not equal, then their squares are not equals” is