Critical reasoning weaken
59 flashcards covering Critical reasoning weaken for the GMAT Verbal section.
Critical reasoning weaken questions challenge you to analyze an argument and identify ways to undermine its conclusion. At their core, these questions present a logical statement—often with premises leading to a claim—and ask you to select evidence or reasoning that exposes flaws, such as unstated assumptions, counterexamples, or inconsistencies. This skill helps build sharper analytical thinking, which is vital for the GMAT as it tests your ability to evaluate arguments critically in real-world business scenarios.
On the GMAT Verbal section, weaken questions appear in critical reasoning passages, where you'll read a brief argument and choose an answer that most effectively weakens the main conclusion. Common traps include options that strengthen the argument, introduce irrelevant details, or only partially address the issue, so it's easy to fall for distractors if you're not careful. Focus on pinpointing the argument's key assumptions and evaluating how answer choices interact with them to create doubt.
A good tip: Always map out the argument's structure before reviewing the choices.
Terms (59)
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What is a weaken question?
A weaken question in GMAT Critical Reasoning asks you to identify an answer choice that undermines or reduces the strength of the argument presented in the passage.
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Premise in an argument
A premise is a statement in an argument that provides evidence or reasons to support the conclusion, and weakening an argument often involves challenging the validity or relevance of these premises.
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Conclusion in an argument
The conclusion is the main claim or inference drawn from the premises, and a weaken question typically targets the logical link between premises and this conclusion.
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Assumption in weaken questions
An assumption is an unstated belief that the argument relies on, and weakening often involves finding an answer that shows this assumption is flawed or unsupported.
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Hidden assumption
A hidden assumption is an implicit premise not directly stated, and identifying it is key in weaken questions to spot vulnerabilities in the argument's logic.
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Strategy for weaken questions
The strategy is to evaluate answer choices that directly attack the argument's assumptions or evidence without introducing new information that might strengthen it.
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Attacking the evidence
In weaken questions, attacking the evidence means questioning the quality, source, or applicability of the data or facts provided in the premises.
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Introducing a counterexample
Introducing a counterexample weakens an argument by providing a specific instance that contradicts the generalization or pattern claimed in the conclusion.
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Questioning the sample
Questioning the sample involves pointing out flaws in the group studied, such as it being too small or unrepresentative, to weaken arguments based on surveys or studies.
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Alternative explanation
An alternative explanation weakens a causal argument by suggesting another cause for the observed effect, thus undermining the original link.
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Scope shift in arguments
A scope shift occurs when the conclusion overgeneralizes from the premises, and weakening involves highlighting this mismatch in breadth or context.
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Overgeneralization flaw
Overgeneralization is a flaw where an argument applies findings from a specific case to a broader population without justification, making it vulnerable to weakening.
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False analogy
A false analogy compares two things that are not sufficiently similar, and weakening involves showing key differences that invalidate the comparison.
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Ad hominem attack
An ad hominem attack targets the person making the argument rather than the argument itself, but in weaken questions, it's about exposing such irrelevant personal attacks.
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Appeal to authority
An appeal to authority relies on an expert's opinion without evidence, and weakening can occur by questioning the expert's relevance or bias.
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Hasty generalization
Hasty generalization draws a conclusion from insufficient evidence, and weakening involves demonstrating that the sample size or evidence is inadequate.
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Post hoc fallacy
The post hoc fallacy assumes that because one event follows another, the first caused the second, and weakening exposes other possible factors.
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Correlation vs. causation
In weaken questions, distinguishing correlation from causation means showing that two associated events do not imply one causes the other.
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Weaken by analogy flaws
Weaken by analogy flaws involve critiquing arguments that use faulty comparisons, emphasizing dissimilarities that make the analogy invalid.
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Statistical errors in arguments
Statistical errors occur when data is misinterpreted, and weakening involves pointing out issues like improper averaging or selective data use.
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Role of answer choices
In weaken questions, answer choices serve to test your ability to select the one that most effectively undermines the argument while avoiding distractors.
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Eliminating wrong answers
Eliminating wrong answers in weaken questions means discarding choices that strengthen the argument, are irrelevant, or introduce unrelated information.
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Common trap: Out of scope
A common trap in weaken questions is selecting an answer that brings in information outside the argument's context, which does not actually weaken it.
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Common trap: Strengthens the argument
A common trap is choosing an answer that actually supports or strengthens the conclusion, mistakenly thinking it weakens it.
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Weaken through causality reversal
Weaken through causality reversal involves suggesting that the cause and effect in the argument might be reversed, thus invalidating the original claim.
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Questioning data validity
Questioning data validity means challenging the accuracy or reliability of the evidence presented, which can weaken the argument's foundation.
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Undermining expert testimony
Undermining expert testimony involves showing that the expert's credentials or the context of their opinion are questionable, thereby weakening the argument.
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Exception to the rule
An exception to the rule weakens an argument by providing a counterinstance that disproves a universal claim made in the conclusion.
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Time-related flaws
Time-related flaws occur when an argument ignores changes over time, and weakening highlights how circumstances have evolved to alter the original logic.
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Biased sample
A biased sample is one that does not represent the whole population, and pointing this out weakens arguments based on such samples.
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Conflicting evidence
Conflicting evidence weakens an argument by introducing facts or data that directly contradict the premises or conclusion.
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Alternative causes
Alternative causes weaken causal arguments by proposing other factors that could explain the outcome without the argued cause.
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Insufficient evidence
Insufficient evidence refers to a lack of supporting data, and highlighting this gap weakens the argument's persuasiveness.
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Overlooking variables
Overlooking variables means the argument ignores important factors, and identifying these omissions can weaken its conclusions.
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Circular reasoning
Circular reasoning uses the conclusion as a premise, and exposing this logical loop weakens the argument's structure.
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Straw man fallacy
A straw man fallacy misrepresents an opponent's argument to make it easier to attack, and weakening involves correcting this misrepresentation.
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Bandwagon appeal
A bandwagon appeal claims something is true because it's popular, and weakening shows that popularity doesn't equate to validity.
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Slippery slope
A slippery slope argument assumes one event will lead to a chain of unlikely events, and weakening demonstrates that the chain is improbable.
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False dilemma
A false dilemma presents only two options when more exist, and weakening involves pointing out additional possibilities.
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Questioning the timing
Questioning the timing involves noting that the sequence of events in the argument might not imply causation, thus weakening it.
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External factors
External factors are outside influences not considered in the argument, and introducing them can weaken the conclusion.
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Inconsistent premises
Inconsistent premises are contradictory statements within the argument, and highlighting this inconsistency weakens the overall logic.
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Analogical differences
Analogical differences emphasize disparities between compared entities, weakening arguments that rely on flawed similarities.
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Probability issues
Probability issues arise when an argument misinterprets chances, and weakening involves correcting the probabilistic reasoning.
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Causation exceptions
Causation exceptions are cases where the argued cause does not apply, and citing them weakens the general claim.
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Survey methodology flaws
Survey methodology flaws include poor question design or respondent bias, and exposing these weakens arguments based on surveys.
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Generalization from anecdotes
Generalization from anecdotes draws broad conclusions from personal stories, and weakening shows that anecdotes aren't representative.
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Red herring
A red herring introduces irrelevant information to distract, and in weaken questions, identifying it helps focus on actual weaknesses.
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Begging the question
Begging the question assumes the conclusion in the premise, and pointing this out weakens the argument's foundation.
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Non sequitur
A non sequitur is a conclusion that doesn't follow from the premises, and weakening involves demonstrating this logical gap.
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Weaken by counterevidence
Weaken by counterevidence means using opposing data or facts to directly challenge the argument's claims.
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Assumption of necessity
Assumption of necessity treats something as required when it's not, and weakening shows alternatives exist.
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Correlation coincidence
Correlation coincidence suggests that correlated events are mere chance, weakening claims of a causal relationship.
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Faulty extrapolation
Faulty extrapolation extends trends beyond supported limits, and weakening highlights the unreasonableness of the extension.
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Contextual changes
Contextual changes are shifts in circumstances that make the argument's premises outdated, thus weakening it.
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Ambiguous language
Ambiguous language in arguments leads to misinterpretation, and clarifying or exploiting this ambiguity can weaken the conclusion.
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Weaken through analogy breakdown
Weaken through analogy breakdown involves showing that the core elements of an analogy do not hold, invalidating the argument.
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Evidence reliability
Evidence reliability questions the trustworthiness of sources, and doubting it weakens the argument's support.
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Causal chain interruption
Causal chain interruption posits a break in the sequence of events, undermining arguments that rely on uninterrupted causality.