UGC NET Questions (Paper – 1)

Statements A, B, C, E and F correctly distinguish tautologies, contradictions and contingencies and relate them to argument validity, while D is false. A tautological conclusion is always true, so any argument with such a conclusion is at least logically valid, though possibly uninformative. Contradictory premises render an argument vacuously valid because there is no case where all premises are true, and recognising logical status helps in judging equivalence and validity in exams. D is wrong because it asserts the opposite about tautological conclusions. Therefore A, B, C, E and F only is the correct combination.

Option A:
Option A is incomplete because it omits E and F, leaving out the role of contradictory premises and the exam-related significance of these distinctions. Although A, B and C are true definitions, they do not connect to argument validity. Thus this option is not complete.

Option B:
Option B is also incomplete, adding E but still omitting F, which summarises the practical usefulness of these categories in UGC NET. Without F, the option lacks an explicit link to reasoning tasks. Hence it cannot be the best answer.

Option C:
Option C is correct since it combines the basic definitions with a key fact about arguments from contradictions and the exam relevance of recognising logical status. It excludes D, which mischaracterises arguments with tautological conclusions. This makes the option logically consistent.

Option D:
Option D is incorrect because it includes D, thereby accepting the false view that tautological conclusions always make arguments invalid, and it omits A, the central definition of tautology. This combination cannot be taken as correct.