UGC NET Questions (Paper – 1)

A valid categorical syllogism must contain exactly three terms: major, minor and middle. If ambiguous language or faulty structure introduces a fourth distinct term, the necessary linkage between major and minor via a single middle term is broken. This defect is known as the fallacy of four terms. Therefore the error described in the stem is correctly named four terms.

Option A:
Option A, undistributed middle, is a different fallacy where the middle term is not distributed in either premise, so it never refers to all members of its class. Although this also breaks the connection between major and minor terms, it does not involve adding an extra term.

Option B:
Option B is correct because the presence of four distinct terms means that the argument cannot be a proper syllogism, which by definition has only three. Often this happens due to equivocation, where a word is used with two different meanings.

Option C:
Option C, illicit major, occurs when the major term is distributed in the conclusion but not in the premise, which is a distribution error, not an increase in the number of terms.

Option D:
Option D, ambiguous conclusion, is not a standard named fallacy in traditional syllogistic logic, and ambiguity alone does not guarantee that exactly four terms are present.

Statements A, B, C and E correctly summarise the requirement that a categorical syllogism use exactly three terms and how violations occur, while D is false. Four distinct terms, whether through outright multiplication or ambiguity of a term, break the three-term rule and generate the fallacy of four terms. A two-term argument is not automatically valid; it may fail other rules. UGC NET questions do ask candidates to detect such fallacies, so E is also true. Hence A, B, C, E only constitutes the right set.

Option A:
Option A is incomplete because it omits E, failing to mention the explicit exam relevance that the question highlights. A, B, C only therefore does not fully answer the stem.

Option B:
Option B is wrong as it leaves out C, ignoring that ambiguity of the middle term can effectively produce four terms even if the same word is used. A, B, E only thus misses an important mechanism of the fallacy.

Option C:
Option C is correct because it collects all true descriptive and exam-related statements and excludes D, which incorrectly declares any two-term syllogism valid. This matches standard treatments of syllogistic structure.

Option D:
Option D is incorrect since it includes D, the false claim about two-term syllogisms, and so B, C, D, E only mixes correct and incorrect information. It therefore cannot be accepted as the correct option.