Q.Statement $p \leftrightarrow q$ is true, when $p$ and $q$ have ______ truth values.

A truth table lists every combination of truth values of the simple statements (2^n rows for n statements) and the resulting value of the compound statement. The basics: ~p reverses p; p and q is true only when both are true; p or q is false only when both are false; p -> q is false only when p is true and q false; p <-> q is t …