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Let and are two mathematical operators. If is not a tautology, then and can be
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The correct answer is:
and respectively
is false only if is false and is false which is never possible simultaneously. Hence, is a tautology
is false only if is true and is false which is never possible simultaneously. Hence, is a tautology
is false only if is true & is false which is possible when is true & is false. Hence, is not a tautology
is false only if is true and is false which is never possible simultaneously. Hence, is a tautology
is false only if is true & is false which is possible when is true & is false. Hence, is not a tautology
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