UGC NET Questions (Paper – 1)

A contradiction is a statement that cannot be true under any assignment of truth values to its components. Its logical form guarantees falsity in every possible case. Such statements are logically impossible and indicate inconsistency. Therefore the compound statement described in the stem is a contradiction.

Option A:
Option A, tautology, is always true and thus stands opposite to contradiction. It does not match the condition of being false in all valuations. Hence tautology is not the correct answer.

Option B:
Option B, contingency, can be true in some cases and false in others. It lacks the universal falsity required by the stem. Therefore contingency is not appropriate here.

Option C:
Option C, paradox, is an informal term for seemingly self-contradictory statements, but not every paradox is logically false under all valuations. The stem instead describes the technical notion of contradiction. Thus paradox is not the best label.

Option D:
Option D correctly names contradiction as the form that is false in every possible situation. Recognising contradictions is crucial for testing the consistency of logical systems. Hence contradiction is the correct choice.