Critical reasoning flaw
51 flashcards covering Critical reasoning flaw for the GMAT Verbal section.
Critical reasoning flaws are logical errors that weaken an argument, making it less persuasive or invalid. These flaws often involve unsupported assumptions, faulty generalizations, or irrelevant evidence. For example, an argument might claim that because event A followed event B, B caused A, which overlooks other possible explanations. Understanding these flaws helps you evaluate arguments effectively, a key skill for critical thinking in business and management decisions, and it's essential for success on exams like the GMAT.
On the GMAT Verbal section, critical reasoning questions frequently test your ability to identify flaws in short passages, often in the form of argument evaluation or assumption questions. Common traps include mistaking correlation for causation, ignoring counterexamples, or falling for emotional appeals disguised as logic. Focus on dissecting the argument's structure—spotting premises, conclusions, and any gaps in reasoning—to answer accurately and avoid distractors.
Practice with sample questions to build your flaw-detection skills.
Terms (51)
- 01
Circular Reasoning
This flaw occurs when an argument assumes its own conclusion as a premise, making the reasoning go in a circle without providing real evidence.
- 02
Ad Hominem
This flaw involves attacking the person making the argument rather than addressing the argument's content, which distracts from the actual issue.
- 03
Hasty Generalization
This error happens when a conclusion is drawn from a sample that is too small or not representative, leading to an overly broad claim.
- 04
False Cause
This flaw assumes that because one event follows another, the first caused the second, ignoring other possible explanations for the relationship.
- 05
Weak Analogy
This occurs when an analogy compares two things that are not sufficiently similar, making the comparison unreliable for drawing conclusions.
- 06
False Dilemma
This flaw presents only two options as if they are the only possibilities, when in fact other alternatives exist that could resolve the issue.
- 07
Slippery Slope
This error argues that a relatively minor action will lead to a chain of increasingly extreme consequences without evidence to support that progression.
- 08
Appeal to Authority
This flaw relies on the opinion of an authority figure without sufficient evidence that the authority is relevant or unbiased in the matter.
- 09
Post Hoc Fallacy
This involves assuming that because event A happened before event B, A caused B, which overlooks other potential causes or coincidences.
- 10
Straw Man
This flaw misrepresents an opponent's argument to make it easier to attack, rather than addressing the actual position being presented.
- 11
Begging the Question
This occurs when the argument's premises assume the truth of the conclusion, essentially restating it in different words.
- 12
Appeal to Emotion
This flaw uses emotional appeals to persuade rather than logical evidence, which can cloud judgment and distract from facts.
- 13
Bandwagon Fallacy
This error suggests that an idea is correct simply because many people believe it, without providing substantive evidence for its validity.
- 14
Overgeneralization
This flaw draws a conclusion about a whole group based on insufficient or unrepresentative evidence, leading to broad and often inaccurate claims.
- 15
Sampling Error
This happens when a sample used in an argument is not representative of the larger population, skewing the conclusions drawn from it.
- 16
Confusing Correlation with Causation
This error mistakes a correlation between two events for a causal relationship, ignoring the possibility that they are unrelated or influenced by a third factor.
- 17
Shifting Burden of Proof
This flaw improperly places the responsibility on the opponent to disprove a claim rather than requiring the claimant to provide evidence.
- 18
Inappropriate Authority
This occurs when an argument cites an expert outside their field of expertise, making the authority's opinion irrelevant to the topic.
- 19
Ambiguity in Language
This flaw uses vague or unclear language that allows for multiple interpretations, leading to confusion or invalid conclusions.
- 20
False Precision
This error presents data with a misleading level of accuracy, such as using exact figures when the information is actually approximate.
- 21
Red Herring
This flaw introduces an irrelevant topic to divert attention from the main issue, making it harder to evaluate the original argument.
- 22
Composition Fallacy
This occurs when assuming that what is true of the parts must be true of the whole, which is not always the case.
- 23
Division Fallacy
This flaw assumes that what is true of the whole must be true of its parts, overlooking differences within the components.
- 24
Gambler's Fallacy
This error believes that past random events affect the probabilities of future independent events, such as expecting a coin to land heads after several tails.
- 25
Non Sequitur
This flaw presents a conclusion that does not logically follow from the premises, creating a jump in reasoning without proper connection.
- 26
Overlooking Alternatives
This happens when an argument fails to consider other possible explanations or solutions, leading to an incomplete or biased conclusion.
- 27
Biased Sample
This flaw uses a sample that is not randomly selected and is influenced by preconceptions, resulting in skewed and unreliable results.
- 28
Extrapolation Error
This occurs when extending trends or data beyond the available evidence without justification, potentially leading to inaccurate predictions.
- 29
Confusing Necessary and Sufficient Conditions
This error treats a necessary condition as if it were sufficient, or vice versa, misunderstanding what is required for an outcome.
- 30
Inconsistency in Evidence
This flaw presents contradictory evidence within the same argument, undermining the overall logic and credibility.
- 31
Questionable Cause
This involves claiming a causal relationship based on weak or indirect evidence, without ruling out other influencing factors.
- 32
Limited Sample
This error bases conclusions on a sample that is too small to be statistically significant, leading to unreliable generalizations.
- 33
Appeal to Ignorance
This flaw argues that a claim is true because it has not been proven false, or vice versa, which is not valid evidence.
- 34
False Analogy in Comparisons
This occurs when an analogy exaggerates similarities while ignoring key differences, weakening the argument's foundation.
- 35
Personal Bias in Argument
This flaw incorporates the arguer's unsubstantiated preferences or prejudices, rather than objective evidence, to support a claim.
- 36
Unwarranted Assumption
This involves making an assumption that is not supported by evidence, which can invalidate the entire line of reasoning.
- 37
Sweeping Generalization
This error applies a general rule to a specific case without considering exceptions, leading to incorrect conclusions.
- 38
Equivocation
This flaw uses a word or phrase in multiple senses within the same argument, creating confusion and illogical connections.
- 39
Ad Populum
This occurs when an argument appeals to popular opinion as evidence, assuming that widespread belief equates to truth.
- 40
Causal Oversimplification
This flaw attributes a complex outcome to a single cause, ignoring the multifaceted factors that may be involved.
- 41
Strategy for Identifying Flaws
To spot flaws, carefully examine the argument's structure, identify unstated assumptions, and check if the evidence logically supports the conclusion.
- 42
Common Traps in Flaw Questions
These include mistaking correlation for causation or overlooking alternative explanations, which often appear in GMAT questions to test critical thinking.
- 43
Evaluating Evidence in Arguments
This involves assessing whether the evidence is relevant, sufficient, and unbiased, as weak evidence often indicates a flaw in the reasoning.
- 44
Distinguishing Correlation from Causation
In arguments, recognize that just because two events occur together does not mean one causes the other; look for direct evidence of causality.
- 45
Recognizing Assumptions
Flaws often stem from unstated assumptions, so practice identifying gaps where the argument jumps from evidence to conclusion without justification.
- 46
Example of Circular Reasoning
For instance, saying 'This policy is good because it is the right thing to do' assumes the policy's goodness without providing external evidence.
The statement 'We should believe this because it's true' illustrates circular reasoning by restating the conclusion.
- 47
Example of Ad Hominem
An argument might dismiss a proposal by attacking the proposer's character, like saying 'Don't listen to him; he's untrustworthy.'
Criticizing a scientist's theory by saying 'He's just in it for the money' is ad hominem.
- 48
Example of Hasty Generalization
Drawing a conclusion from a few instances, such as assuming all products from a company are bad based on one faulty item.
Concluding that all dogs are aggressive after meeting one aggressive dog.
- 49
Example of False Cause
Claiming that wearing a lucky charm caused a team to win, ignoring other factors like skill or preparation.
Believing that rain caused a parade to be canceled, when it was actually due to scheduling.
- 50
Advanced Nuance in Flaw Identification
On the GMAT, flaws can be subtle, such as when an argument uses ambiguous terms that shift meaning, requiring precise analysis of language.
- 51
Contextual Flaws in Business Scenarios
In GMAT passages, flaws might involve overlooking market variables, like assuming a strategy works everywhere without considering regional differences.