UGC NET Questions (Paper – 1)

Statements A, C and D are correct, while B and E are false. The post hoc fallacy wrongly infers causation merely from temporal order, ignoring other possible explanations. Because correlation and temporal succession alone are not enough, careful design and control of experiments are needed to eliminate competing causes. UGC NET questions sometimes present arguments that rely on this faulty reasoning and ask candidates to detect the mistake. Post hoc inference is therefore not a valid deductive form, making E incorrect, and the correct set is A, C, D only.

Option A:
Option A is incomplete as it omits D, leaving out the explicit connection to UGC NET question formats. A and C only thus does not satisfy the full requirements of the stem.

Option B:
Option B is wrong since it leaves out A, failing to state explicitly what the post hoc fallacy is, and C and D alone do not identify the fallacy pattern. C and D only therefore cannot be correct.

Option C:
Option C is correct because it captures the definition of the fallacy, the need for better evidence, and its appearance in exam items while excluding B and E, which overstate the power of correlation and treat post hoc as valid deduction.

Option D:
Option D is incorrect as it includes B, thereby wrongly claiming that correlation and temporal succession are always sufficient for causation, and so A, B, C, D only mixes truth with clear error.

The ad populum fallacy appeals to the popularity of a belief as though widespread acceptance were decisive evidence of its truth. It confuses social agreement with logical justification. Truth, however, depends on facts and reasoning, not merely on the number of believers. Thus the fallacy described in the stem is ad populum.

Option A:
Option A, slippery slope, warns without sufficient support that a small step will lead to disastrous outcomes. It has nothing to do with counting believers. So slippery slope is not the correct answer.

Option B:
Option B, false dilemma, restricts options to two extremes when more alternatives exist. This misrepresentative framing differs from appealing to popularity. Hence false dilemma does not fit the question.

Option C:
Option C, equivocation, relies on shifting the meaning of a key term within an argument. It is a linguistic fallacy, not one based on majority opinion. Therefore equivocation is not appropriate here.

Option D:
Option D correctly identifies ad populum as arguing that a claim is true because many people accept it. Such appeals to popularity are logically weak and may hide lack of evidence. Thus ad populum is the best choice.

A representative sample mirrors the relevant characteristics of the larger population, such as proportions of key traits. When a sample is representative, findings drawn from it are more likely to hold for the population, thereby strengthening the inductive generalisation. Bias or distortion in the sample undermines this support. Thus the factor identified in the question is the representativeness of the sample.

Option A:
Option A, emotional appeal, may influence how persuasive an argument feels but does not improve its logical reliability. Emotional factors do not ensure that the sample accurately reflects the population and therefore do not strengthen the inductive inference.

Option B:
Option B, novelty, merely indicates that the sample is new or recently collected. Novel data can still be biased or unrepresentative, so novelty alone is not a key determinant of inductive strength.

Option C:
Option C is correct because representativeness addresses whether the sample is a microcosm of the population with respect to the property being studied. Only when this condition is met can we reasonably extend sample-based conclusions to the larger group.

Option D:
Option D, convenience, refers to selecting cases that are easy to access, which often results in biased samples. Convenience sampling tends to weaken the reliability of generalisations rather than strengthen them.

In UGC NET assertion–reason items, special codes indicate the truth values of A and R and their explanatory relation. When both statements are true and the reason genuinely explains the assertion, a specific code is prescribed. That code explicitly mentions that A and R are true and that R is the correct explanation of A. Hence the code described in the stem corresponds to Option A.

Option A:
Option A accurately states that A is true, R is true and R correctly explains A. This matches the condition specified in the question. Therefore it is the appropriate code for this pattern of truth and explanation.

Option B:
Option B states that both A and R are true but R is not the correct explanation of A. This is used when the statements are independently true but not explanatorily linked. It thus fails to capture the explanatory relation mentioned in the stem.

Option C:
Option C reports that A is true while R is false. Under this code, the reason cannot possibly explain the assertion. Therefore it contradicts the condition that both A and R are true and related explanatorily.

Option D:
Option D indicates that A is false and R is true, which reverses the state of the assertion. In such a case, R cannot correctly explain a false assertion. Hence this code does not satisfy the description in the question.

A, B, C and E are correct; D is false. Soundness is a property of valid deductive arguments with true premises, not something “inductive rather than deductive”. Deduction aims at certainty (given validity and true premises), induction at probability; if a deductive conclusion is false then validity or premises fail. Distinguishing them is common in UGC NET.

Option A:
Option A is incorrect because A is true; it wrongly includes A as wrong.

Option B:
Option B is incorrect because C is true; grouping it with D as wrong is incorrect.

Option C:
Option C is incorrect because B and E are true; treating them as wrong makes the option invalid.

Option D:
Option D is correct because D is the only wrong statement.

A, B, C and E are correct descriptions of ambiguity/equivocation and their exam relevance. D is wrong because metaphorical language does not automatically involve a fallacious shift of meaning within an argument’s key term. Therefore D alone is wrong.

Option A:
Option A is correct because it isolates D as the only incorrect statement.

Option B:
Option B is incorrect because it wrongly adds A as wrong; A is the definition of equivocation.

Option C:
Option C is incorrect because it wrongly adds C as wrong; clarifying ambiguity is indeed important.

Option D:
Option D is incorrect because it wrongly adds B as wrong; B correctly describes ambiguity.

A valid argument is one whose logical form guarantees that if the premises are true, the conclusion must also be true. This condition rules out any counterexample with true premises and a false conclusion. Validity concerns the structure of the argument rather than the actual truth of its premises. Therefore the type of argument described in the stem is a valid argument.

Option A:
Option A is correct because validity is defined precisely by the impossibility of true premises leading to a false conclusion. Even if the premises are in fact false, a valid form ensures that no logically consistent counterexample violates this constraint. This matches the requirement given in the question.

Option B:
Option B, sound, is a stronger notion that requires an argument to be both valid and to have all true premises. The stem does not specify that the premises are actually true, only that if they were, the conclusion could not be false, so soundness goes beyond what is stated.

Option C:
Option C, weak, usually describes an inductive argument whose premises provide only limited support for the conclusion. It does not apply to deductive arguments with guaranteed truth preservation.

Option D:
Option D, cogent, refers to an inductive argument that is strong and has true premises, leading to a probably true conclusion. This concept belongs to inductive reasoning, not to the kind of deductive necessity mentioned in the stem.

A straw man fallacy occurs when someone distorts an opponent’s position into a weaker or exaggerated version and attacks that instead of the original view. In the given statement, the speaker changes “spend more on education” into “ignore all other public needs,” which the opponent never claimed. The distorted position is easier to criticise and therefore misrepresents the actual proposal. This is a classic case of setting up and knocking down a straw man.

Option A:
Option A, ad hominem, would attack the person’s character rather than their argument, which is not the focus here.

Option B:
Option B properly describes the error of turning a moderate proposal into an extreme one for the sake of refutation. The original claim is unfairly exaggerated.

Option C:
Option C, appeal to authority, involves citing an expert or famous person as evidence without examining the reasoning, which is not happening in this argument.

Option D:
Option D, false dilemma, would limit the choices to just two extreme options, which is not the structure of this misrepresentation.

The ad hominem fallacy occurs when someone attacks an opponent’s character, motives or other personal traits rather than engaging with the argument. Such attacks are irrelevant to the truth of the claim being discussed. This shifts focus away from reasons and evidence. Therefore the fallacy described in the stem is ad hominem.

Option A:
Option A, straw man, misrepresents an opponent’s position and then attacks the distorted version. It is a fallacy of mischaracterisation, not of personal attack. Hence straw man is not the correct answer here.

Option B:
Option B, slippery slope, suggests without adequate support that a relatively small step will inevitably lead to a chain of disastrous events. It concerns causal exaggeration, not attacks on persons. Thus slippery slope does not fit the description.

Option C:
Option C, false cause, wrongly assumes a causal connection between events without proper justification. It deals with causation rather than the personal qualities of a speaker. Therefore false cause is not the fallacy indicated in the question.

Option D:
Option D correctly names ad hominem as the practice of criticising the person instead of the argument. Logical assessment requires focusing on reasons and evidence, not on irrelevant personal attacks. Hence ad hominem is the best choice.

Statement A correctly defines the ad hominem fallacy as an attack on the person rather than the argument. Statement B accurately describes the straw man technique of distorting an opponent’s view. Statement C is also correct, as hasty generalisation relies on too few or biased examples to support a broad claim. Statement D is false because valid deductive arguments are structurally correct, not fallacious, and E is false since an expert authority can provide legitimate support in many contexts. Hence A, B and C only are correct, which is option C.

Option A:
Option A is incomplete since it omits C and thereby leaves out a major type of fallacy frequently tested in NET reasoning questions.

Option B:
Option B is incorrect as it includes D, which wrongly labels all valid deductions as fallacies, and it omits C, so it contains an error and misses one correct fallacy definition.

Option C:
Option C is correct because it gathers the accurate characterisations of three distinct and important fallacies, while excluding D and E, which misdescribe valid deduction and the role of authority.

Option D:
Option D is wrong since it includes E, which claims that appeal to authority is always fallacious, ignoring legitimate expert testimony, and it omits A, losing a key fallacy type.

The argument’s form is: All A are B; All B are C; Therefore, All A are C. This is a standard valid syllogistic pattern; if the premises were true, the conclusion would necessarily follow. However, in reality the premises “All squares are circles” and “All circles are triangles” are false. Because at least one premise is false, the argument is not sound, even though its logical form is valid. Therefore, it is valid but unsound.

Option A:
Option A would require both validity and the truth of premises, which is not satisfied here because the premises distort geometric facts.

Option B:
Option B separates form and content, recognising that the inference pattern is correct while the factual premises render the argument unsound.

Option C:
Option C is impossible, because soundness presupposes validity; an invalid argument cannot be sound.

Option D:
Option D wrongly denies the validity of the form simply because the premises are false, confusing logical structure with factual accuracy.

Statements A, B, C and D correctly distinguish truth from validity and define soundness. E is false because a true conclusion can result from invalid reasoning. Therefore A, B, C and D are the correct statements.

Option A:
Option A is incomplete because it omits D, the definition of soundness (validity + true premises).

Option B:
Option B is incorrect because it includes E, which is false, and it also omits D, which is true.

Option C:
Option C is incorrect because it omits A, which is true (validity does not require true premises).

Option D:
Option D is correct as it gathers all four true statements (A, B, C, D) and omits E.

A valid argument is one in which it is impossible for the premises to be true and the conclusion false. This captures the idea that the conclusion follows necessarily from the premises. Validity concerns the logical form of the argument, not the actual truth of its statements. Therefore the argument described in the stem is correctly called valid.

Option A:
Option A names valid argument, which is defined by necessary truth preservation from premises to conclusion. It exactly fits the description that the conclusion must follow from the premises. Hence this option is the correct label.

Option B:
Option B, sound, additionally requires that a valid argument have all true premises. Soundness is a stronger property than validity. Since the stem mentions only necessary following, not truth of premises, sound is not the best match.

Option C:
Option C, weak, usually describes an inductive argument in which the premises provide little support for the conclusion. Weak arguments do not ensure or strongly suggest the truth of the conclusion. Thus weak is opposite to the idea expressed in the question.

Option D:
Option D, persuasive, indicates that an argument is psychologically convincing, which may occur even if it is logically bad. Persuasion depends on audience factors rather than strict logical consequence. Therefore persuasive is not the technical term required here.

Hetvabhasa literally means "that which appears like a hetu" and refers to reasons that mimic valid middle terms but do not actually establish the sadhya. Such defects may arise from irregularity, contradiction, absence in the paksha or being defeated by stronger evidence. Identifying hetvabhasas is crucial for spotting fallacies in inference. Thus the deceptive reason described in the stem is called hetvabhasa.

Option A:
Option A, vyapti, is the genuine universal concomitance between hetu and sadhya and is a sign of correctness, not of fallacy. It underwrites valid inference rather than indicating error.

Option B:
Option B is correct because hetvabhasa is the umbrella term for several standard types of fallacious reasoning in Nyaya, such as savyabhicara, viruddha and asiddha. Each example illustrates how an apparent reason can fail logically.

Option C:
Option C, drstanta, is the illustrative example used to support the inference and is not itself the defective reason, though it can reveal defects.

Option D:
Option D, paksha dharma, simply indicates a property present in the paksha and may or may not function as a suitable hetu; it is not inherently fallacious.

Statement A is correct because the proposed action must respond directly to the issue described. Statement C is also true since realistic feasibility and reasonableness are central to judging whether a course of action is strong. Statement E is correct as some questions intentionally include more than one acceptable course, and candidates must recognise all that are reasonable. Statement B is false because emotional appeal alone does not outweigh impracticality. Statement D is false since polite language cannot make an impractical or irrelevant action strong. Hence the combination A, C and E only is correct.

Option A:
Option A is correct because it collects the three statements that reflect how course of action questions are supposed to be analysed and excludes B and D, both of which downplay logic and feasibility.

Option B:
Option B is incorrect as it includes B, which suggests that emotional but impractical steps might be considered strong, contradicting the logical focus of such items.

Option C:
Option C is wrong because it includes D, which is clearly false as politeness does not guarantee acceptability, and it omits A, which is essential.

Option D:
Option D is also incorrect because it retains D while omitting C, losing the explicit feasibility criterion and keeping a faulty one.