UGC NET Questions (Paper – 1)

Statements A, B, C, D and F give a correct account of hypothetical and disjunctive syllogisms, whereas E is false. Hypothetical syllogisms use conditionals, and a pure hypothetical form like “If p then q; if q then r; therefore if p then r” is valid. Disjunctive syllogism, “p or q; not p; therefore q”, is a standard valid pattern, and chains of conditionals can be understood as repeated applications of modus ponens. UGC NET questions sometimes hide these structures in ordinary language. E is wrong because the mere presence of “or” does not make an argument invalid; it depends on how the disjunction is used.

Option A:
Option A is incomplete as it omits F, failing to mention that such patterns often appear implicitly in exam questions. While A, B, C and D are true descriptions of the logical forms, they do not connect these forms to their test usage. Thus A, B, C and D only is not fully adequate.

Option B:
Option B is incorrect because it includes E, which claims that all disjunctive syllogisms are invalid, contrary to basic logic where disjunctive syllogism is a paradigmatic valid form. Including E invalidates the entire combination. Hence A, B, C, D and E only cannot be accepted.

Option C:
Option C is wrong as it omits A and includes only B, C, D and F, leaving out the general characterisation of hypothetical syllogisms as involving conditionals. Without A, the picture of the pattern is incomplete. Therefore B, C, D and F only cannot be the right answer.

Option D:
Option D is correct because it gathers all the true statements and excludes E, which mischaracterises the status of disjunctive syllogisms. It accurately reflects the formal patterns and acknowledges how they are embedded in UGC NET reasoning questions. Consequently, A, B, C, D and F only is the appropriate answer.

Drstanta is the illustrative instance cited in a Nyaya inference to make the vyapti between hetu and sadhya clear. It typically refers to a familiar case where the reason and the probandum are known to co-occur, such as a kitchen where smoke and fire are always found together. By presenting this example, the arguer helps the listener grasp and accept the universal concomitance underlying the inference. Thus the example described in the stem is called drstanta.

Option A:
Option A, paksha, is the subject in which the property is to be established, such as the hill said to be fiery. It is the locus of inference, not the illustrative case demonstrating the general relation.

Option B:
Option B is correct because drstanta literally means “seen example” and functions to support the step from general rule to the specific case by reminding the audience of known instances. It is a distinct member of the five-part Nyaya argument.

Option C:
Option C, upanaya, is the application step that explicitly connects the general vyapti shown by the drstanta to the paksha, stating that the reason present in the subject falls under that universal relation.

Option D:
Option D, nigamana, is the final concluding statement that restates the thesis as established, not the example used to clarify the inference.

Nigamana is the concluding step in which the original pratijna is reiterated as proven in light of the presented hetu, drstanta and upanaya. It summarises the inferential achievement by affirming that the sadhya indeed holds in the paksha. This closure makes the argumentative status of the thesis explicit. Therefore the final member described in the stem is called nigamana.

Option A:
Option A, pratijna, is the initial thesis statement that precedes justification and cannot be the concluding affirmation. It opens rather than closes the argument.

Option B:
Option B, hetu, provides the reason and appears as the second member, offering support but not functioning as the summarising conclusion.

Option C:
Option C, udaharana, gives the general rule with example and is located in the middle of the sequence, not at the end.

Option D:
Option D is correct because nigamana literally means "drawing together" and is reserved for the point at which the argument is brought to a formal close by restating the now-supported claim.

According to classical Nyaya, there are exactly four independent sources of valid knowledge: pratyaksha, anumana, upamana and sabda. Each pramana has its own distinctive causal structure and domain of application. Accepting four pramanas allows Nyaya to explain a wide range of cognitions, from direct sense experience to knowledge of remote facts conveyed by trustworthy speakers. Therefore the correct number of pramanas in Nyaya is four.

Option A:
Option A, three, would leave out one of the standard Nyaya pramanas and thus under-represent the richness of their epistemic classification. Some other schools like Samkhya accept three pramanas, but Nyaya explicitly adds comparison as a fourth. Hence three is not accurate for Nyaya.

Option B:
Option B is correct because Nyaya counts perception, inference, comparison and verbal testimony as mutually irreducible sources of knowledge. This fourfold scheme becomes a benchmark against which other Indian schools define their own pramana lists.

Option C:
Option C, five, would match neither the classical Nyaya nor the usual Navya-Nyaya enumeration, which still keeps the same four. Although some other systems add further pramanas, Nyaya remains committed to four.

Option D:
Option D, six, corresponds to pramana lists in traditions such as Bhatta Mimamsa or Advaita Vedanta, which include arthapatti and anupalabdhi; it does not describe Nyaya doctrine.

Inference is the core process through which we move from given information to a new claim that is taken to follow from it. In logic, premises are connected to a conclusion precisely by acts of inference. This process can be either deductive, aiming at necessity, or inductive, aiming at probability. Therefore the mental act described in the question is correctly termed inference.

Option A:
Option A is correct because inference specifically names the reasoning step that links premises to a conclusion. Whenever we argue that something must or is likely to be true based on other statements, we are performing an inference. This term is central to the study of logical reasoning and captures exactly what the stem describes.

Option B:
Option B, explanation, is concerned with clarifying why a statement that is already accepted is true, rather than deriving a new conclusion from premises. Explanations often assume the truth of what they explain and do not necessarily involve a structured inferential move. Hence explanation does not accurately name the general process of drawing conclusions from given statements.

Option C:
Option C, description, merely reports or depicts a situation without going beyond the information presented. A description can be detailed and accurate, yet it does not by itself generate a novel claim from other statements. Thus description does not match the idea of deriving a conclusion through reasoning.

Option D:
Option D, observation, refers to noticing or perceiving facts, usually through the senses, and is a source of information rather than a logical operation on statements. Observation may supply premises, but it is not the act of connecting those premises to a conclusion. Therefore observation is not the correct choice.

All five statements are correct: truth tables enumerate combinations, test validity via true-premise/false-conclusion rows, identify tautologies by all-true columns, require 2³ = 8 rows for three variables, and underpin many exam solutions even when not drawn.

Option A:
Option A is incomplete because it omits E (implicit exam use).

Option B:
Option B is incomplete because it omits D (8-row fact for three variables).

Option C:
Option C is correct because it includes all true statements (A–E).

Option D:
Option D is incorrect because it omits A (the basic definition of what truth tables do).

Pratyaksha is defined in Nyaya as knowledge generated by the direct contact of sense organs with their appropriate objects. Such cognition is immediate and does not depend on prior inference or testimony for its occurrence. It provides a basic and widely accepted source of information about the world. Thus, the sense-based knowledge mentioned in the stem is correctly termed pratyaksha.

Option A:
Option A, anumana, refers to inferential knowledge that arises from a sign and its invariable concomitance with the probandum and is therefore mediate rather than immediate. It presupposes pratyaksha or other pramanas for the establishment of vyapti. Hence anumana does not satisfy the condition of direct sense contact described in the stem.

Option B:
Option B is correct because pratyaksha literally means perception and is specifically tied to the operation of the senses in Nyaya. It captures the immediacy and non-inferential character of the cognition described. By isolating pratyaksha as a distinct pramana, Nyaya can examine conditions under which perceptual knowledge is valid or defective.

Option C:
Option C, upamana, is comparison-based knowledge where an unfamiliar object is understood through similarity with a known one and does not rely solely on fresh sense contact with that object. The key element there is recognition of likeness rather than mere sensory presence.

Option D:
Option D, sabda, denotes verbal testimony as a pramana, where one acquires knowledge by trusting the statements of reliable speakers or scriptures. It is mediated by language and authority, not by the bare functioning of the senses.

Statements A, B, C and E accurately describe the threefold classification of inference in Indian logic and its exam relevance, while D is false. Pūrvavat moves from cause to effect, śeṣavat from effect to cause, and sāmānyato dṛṣṭa rests on general observation not limited to a single causal link. Far from being rejected, all three are taken as legitimate types of inference, and UGC NET frequently uses examples to test this distinction. Thus A, B, C, E only is the correct group of statements.

Option A:
Option A is incomplete because it omits E, ignoring that exam questions may directly ask students to classify examples according to these types. A, B, C only therefore does not fully satisfy the question requirements.

Option B:
Option B is correct because it includes all of the true descriptive and exam-related statements while excluding D, which wrongly claims that one type is rejected. This combination matches standard Indian philosophy texts.

Option C:
Option C is wrong since it excludes A, losing the explanation of pūrvavat inference and thereby presenting only part of the scheme. B, C, E only does not cover the entire threefold division.

Option D:
Option D is incorrect because it leaves out B, failing to include śeṣavat, and so A, C, E only is incomplete.

B, C and E are correct; A and D are false. A simple proposition has no logical connective; compound propositions use connectives. “It is raining and it is cold” is compound; “It is raining” is simple. Recognising this helps symbolic translation in UGC NET.

Option A:
Option A is incorrect because it includes A, which wrongly says a simple proposition contains a connective.

Option B:
Option B is incomplete because it omits E (exam translation relevance), which is true.

Option C:
Option C is correct because it includes all true statements (B, C, E) and excludes A and D (false).

Option D:
Option D is incorrect because it includes A and D, which are false.

Deductive reasoning starts from general premises or principles and derives specific conclusions from them. If the deductive argument is valid and its premises are true, the conclusion must be true. This feature of logical necessity is a hallmark of deduction. Hence reasoning from general to particular is correctly called deductive reasoning.

Option A:
Option A, inductive, works in the opposite direction, moving from particular cases to generalisations. Induction yields probabilistic support rather than necessary truth. Therefore it does not match the general-to-specific pattern described in the stem.

Option B:
Option B, analogical, relies on similarity between cases rather than on a general principle covering all relevant instances. Analogies suggest probable conclusions based on resemblance. Thus analogical reasoning is not defined by moving from general principles to specific conclusions.

Option C:
Option C correctly names deductive reasoning as the process of deriving specific claims from general assumptions. It preserves logical structure such that true premises guarantee a true conclusion. This makes deductive the best fit for the description in the question.

Option D:
Option D, causal, focuses on cause–effect relations and may be either inductive or deductive in structure. Causal reasoning does not by itself specify the direction from general to specific. Therefore it is not the most accurate label for the reasoning described here.

Vyapti denotes the universal and exceptionless relation connecting the reason (hetu) with the probandum (sadhya). It states that wherever the hetu is present, the sadhya is also present, and wherever the sadhya is absent, the hetu is absent. Establishing vyapti through positive and negative instances is what justifies moving from a perceived sign to an unperceived conclusion in anumana. Therefore the relation described in the stem is called vyapti.

Option A:
Option A, paksha, is the subject or locus in which the sadhya is to be established, such as the hill in the classic smoke–fire example. It is not the relation between hetu and sadhya.

Option B:
Option B, hetu, is the reason or middle term that indicates the presence of the sadhya, like smoke indicating fire. While hetu participates in vyapti, it is not the name of the universal relation itself.

Option C:
Option C is correct because vyapti captures the pattern “wherever this, there that” which gives inferential force to anumana. Without vyapti, the step from observed sign to unobserved property would lack rational justification.

Option D:
Option D, drstanta, is the illustrative example that shows the vyapti in a familiar case, such as a kitchen where smoke and fire always go together. It is evidence for vyapti, not the relation itself.

A premise is a statement that offers reasons or evidence for accepting a conclusion. It forms the supporting part of an argument on which the inference rests. Without premises, there would be no logical basis for moving to a conclusion. Therefore the statement described in the stem is correctly termed a premise.

Option A:
Option A names the conclusion, which is the claim an argument is trying to establish. The conclusion is supported by other statements rather than providing the support itself. Thus conclusion does not describe the evidential role mentioned in the question.

Option B:
Option B correctly identifies premise as the supporting statement in an argument. Premises supply the grounds from which the conclusion is inferred. Hence this option exactly matches the description of giving reasons or evidence for the conclusion.

Option C:
Option C, illustration, provides examples to clarify an idea but is not the basic name for a supporting statement. An illustration can accompany a premise but does not replace the technical role of premise in an argument. Therefore illustration is not the best term here.

Option D:
Option D, example, is a particular instance used to make a point clearer. While examples can be used inside premises, they are not the general name for statements that support a conclusion. So example is too narrow and does not answer the question precisely.

A, B, C and E correctly describe recognised hetvābhāsas and common exam patterns. D is wrong because asādhāraṇa hetu is not “common to many instances”; it is too restricted/unique, which makes it defective rather than ideal. Thus D alone is the incorrect statement.

Option A:
Option A is correct because it identifies D as the only wrong statement while treating A, B, C and E as correct.

Option B:
Option B is incorrect because it wrongly includes C as a wrong statement; C correctly describes bādhita hetu.

Option C:
Option C is incorrect because it wrongly includes A as wrong; A accurately characterises savyabhicāra (irregular) hetu.

Option D:
Option D is incorrect because it wrongly includes E as wrong; E correctly states a common exam pattern.

Statements A, B, C and E correctly explain how truth tables are used to test validity, while D and F are false. Validity is checked by looking for a counterexample row with true premises and false conclusion, and the absence of such a row shows validity. The number of rows indeed increases exponentially with the number of distinct simple propositions. D is wrong because truth tables work for any finite number of premises, and F is unrealistic about exam expectations, where simpler reasoning is usually sufficient.

Option A:
Option A is incomplete because it omits E, failing to mention the key fact that truth table size grows rapidly with the number of propositions. While A, B and C correctly describe the validity test, they do not fully address the structure of truth tables. Hence this option does not contain all the correct statements.

Option B:
Option B is correct since it brings together the procedural rules for testing validity and the structural observation about row growth, without adding the unrealistic or incorrect claims of D and F. It captures both conceptual understanding and practical awareness. Therefore this option is consistent with how truth tables are taught for UGC NET.

Option C:
Option C is wrong because it includes F, implying that students must always construct very large tables during the exam, which is not expected at Paper 1 level. It also omits C’s explicit statement of the condition for validity. This combination therefore misrepresents both difficulty and method.

Option D:
Option D is incorrect as it includes F and omits A, losing the basic explanation of how truth tables identify invalidity. With F present, it misleads students about exam requirements, and the absence of A leaves out the essential test for counterexamples. Thus B, C, E and F only cannot be the right answer.

A contradiction is a statement that cannot be true in any possible situation because its form guarantees falsity on every line of its truth table. It is logically inconsistent and unsatisfiable, meaning no assignment of truth values makes it hold. Such statements often arise from combining a claim and its negation. Therefore the statement described in the stem is accurately called a contradiction.

Option A:
Option A is correct because contradictions exhibit the extreme case of logical falsity: they are false in all possible worlds or under all valuations. Recognising contradictions is important in proofs by contradiction and in detecting inconsistent sets of premises.

Option B:
Option B, tautology, is the exact opposite: a statement that is true under every possible assignment of truth values. While it also has a uniform truth-value pattern, that pattern is truth rather than falsehood.

Option C:
Option C, contingency, is true under some assignments and false under others, which is the normal status of most factual claims. The stem, however, speaks of a statement that is false in every possible case.

Option D:
Option D, hypothesis, refers to a provisional assumption or conjecture and does not specify a particular truth-table pattern. A hypothesis could be a tautology, contradiction or contingency depending on its logical form and content.