If q is false and is true, then which one of the following statements is a tautology?
A statement pattern is called tautalogy, if it is always true, whatever may be the truth values of constitute statements.
Truth Table of 'AND' operator -
Truth Table of "if and only if" -
Truth table of 'OR' operator -
Case 1 is true and r is true It is not possible as q is false
Case 2 is false and r is false
which may be T/F
which is always True.
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