Logical fallacies on the GMAT

Terms (53)

1. 01

   Ad Hominem

   A logical fallacy where an argument attacks the character or motives of a person instead of addressing the substance of their claim, undermining the discussion rather than the idea.

2. 02

   Appeal to Authority

   A fallacy that relies on the testimony of an unqualified or irrelevant authority figure to support a claim, rather than on evidence or logic, which can mislead in arguments.

3. 03

   Bandwagon Fallacy

   An error in reasoning that assumes something is true or good simply because many people believe or do it, ignoring evidence and leading to flawed conclusions based on popularity.

4. 04

   Begging the Question

   A circular fallacy where the argument assumes the truth of what it is trying to prove, making the conclusion restate the premise without providing real support.

5. 05

   False Dilemma

   A fallacy that presents only two options as if they are the only possibilities, when other alternatives exist, oversimplifying complex issues and limiting critical thinking.

6. 06

   Hasty Generalization

   Drawing a broad conclusion based on insufficient or unrepresentative evidence, such as from a small sample, which can lead to inaccurate assumptions in arguments.

7. 07

   Slippery Slope

   A fallacy that assumes a small initial action will lead to a chain of increasingly extreme consequences without evidence, exaggerating potential outcomes in debates.

8. 08

   Straw Man

   Misrepresenting an opponent's argument to make it easier to attack, then refuting the distorted version instead of the original point, weakening fair discussion.

9. 09

   Post Hoc Fallacy

   Assuming that because one event follows another, the first caused the second, without proving causation, which can result in mistaken cause-and-effect claims.

10. 10

    Weak Analogy

    Using a comparison between two things that are not sufficiently similar, leading to flawed conclusions by overlooking key differences in the analogy.

11. 11

    Circular Reasoning

    A type of begging the question where the argument's conclusion is restated in the premises, creating a loop that fails to provide independent evidence.

12. 12

    Red Herring

    Introducing an irrelevant topic to distract from the main issue in an argument, diverting attention and avoiding the original point of contention.

13. 13

    Appeal to Emotion

    Manipulating feelings like fear or pity to support a claim, rather than using logic or evidence, which can cloud judgment in decision-making.

14. 14

    False Cause

    Incorrectly identifying a cause-and-effect relationship, such as confusing correlation with causation, leading to erroneous conclusions about influences.

15. 15

    Overgeneralization

    Making a sweeping statement based on limited evidence, ignoring exceptions or variations, which can distort understanding of broader patterns.

16. 16

    Equivocation

    Using a word or phrase in multiple senses within an argument, creating ambiguity that allows for misleading conclusions from shifting meanings.

17. 17

    Composition Fallacy

    Assuming that what is true of the parts must be true of the whole, such as attributing group properties to individuals without justification.

18. 18

    Division Fallacy

    Assuming that what is true of the whole must be true of its parts, overlooking differences that make the generalization inaccurate.

19. 19

    Ad Populum

    A fallacy that claims something is true because it is popular or widely believed, disregarding evidence and relying on social pressure for validation.

20. 20

    Loaded Question

    Asking a question that contains an unjustified assumption, forcing the respondent into a biased answer and skewing the discussion unfairly.

21. 21

    No True Scotsman

    A fallacy that protects a claim from counterexamples by arbitrarily redefining terms, such as saying 'no true example exists' to dismiss evidence.

22. 22

    Gambler's Fallacy

    Believing that past random events affect future probabilities in independent trials, like expecting a win after losses, which misapplies probability.

23. 23

    Poisoning the Well

    Discrediting an argument or source in advance to prejudice the audience, making objective evaluation difficult by introducing bias early.

24. 24

    Inappropriate Appeal to Authority

    Citing an expert outside their field or without credentials, using their status to bolster a claim without relevant evidence.

25. 25

    Causal Oversimplification

    Reducing complex causes to a single factor, ignoring other influences, which can lead to incomplete or misleading explanations in arguments.

26. 26

    Straw Man Variation: Exaggeration

    A specific straw man tactic that exaggerates an opponent's position to make it easier to refute, distorting the original argument for effect.

27. 27

    Hasty Generalization Trap

    Falling for generalizations from anecdotal evidence, a common error on tests where small samples are presented as representative.

28. 28

    Slippery Slope in Policy Arguments

    How this fallacy appears in debates about changes, predicting dire outcomes without evidence, often in GMAT scenarios involving regulations.

29. 29

    False Dilemma in Choices

    Presenting options as mutually exclusive when they are not, a trap in decision-making questions that limits perceived alternatives.

30. 30

    Post Hoc in Historical Analysis

    Misinterpreting sequence as causation in historical events, a frequent flaw in GMAT passages analyzing trends or outcomes.

31. 31

    Weak Analogy in Comparisons

    Using superficial similarities to draw conclusions, ignoring critical differences, as seen in arguments comparing unrelated scenarios.

32. 32

    Strategy for Spotting Ad Hominem

    Look for attacks on a person's character rather than their argument; question if the response addresses the claim or shifts to personal criticism.

33. 33

    Example of Begging the Question

    The statement 'This policy is right because it's the correct approach' is circular, as it assumes what it tries to prove without external evidence.

34. 34

    Common Trap in Appeal to Authority

    Relying on a celebrity's opinion on a non-expertise topic, like an actor endorsing a medical treatment, which distracts from factual evaluation.

35. 35

    Advanced: Equivocation in Definitions

    When a term's meaning shifts subtly, such as using 'bank' to mean both a financial institution and a river edge, leading to confused logical connections.

36. 36

    Identifying Red Herring in Debates

    Watch for topics that divert from the main issue, like discussing personal lives in a policy argument, to maintain focus on core evidence.

37. 37

    Sub-Concept: False Cause Chains

    A variation where multiple events are linked without proof, assuming a domino effect that isn't supported, common in predictive arguments.

38. 38

    Overgeneralization in Statistics

    Applying data from a specific group to everyone, like assuming a study's results on one demographic represent all people, leading to flawed inferences.

39. 39

    Straw Man Counter-Strategy

    Reconstruct the original argument accurately before responding, ensuring you address what was actually said rather than a weakened version.

40. 40

    Appeal to Emotion in Advertising

    Using fear or desire to sway opinions without facts, as in ads that evoke anxiety about health without scientific backing.

41. 41

    Division Fallacy in Teams

    Assuming individual members share all traits of the group, like saying every employee is innovative just because the company is.

42. 42

    Loaded Question in Surveys

    Questions like 'Don't you agree this is the best option?' that presuppose agreement, biasing responses in opinion polls.

43. 43

    Advanced: Composition in Systems

    Erroneously applying part qualities to the whole, such as thinking a machine works because one component does, ignoring interactions.

44. 44

    Gambler's Fallacy in Probability

    Expecting a coin to land heads after tails, mistakenly thinking events balance out, which ignores independent trial outcomes.

45. 45

    Poisoning the Well in Media

    Discrediting a source before presenting their argument, like labeling an expert as biased, to undermine credibility preemptively.

46. 46

    False Dilemma in Ethical Choices

    Framing morals as all-or-nothing, such as 'Either support this law or be unethical,' when nuanced positions exist.

47. 47

    Hasty Generalization from Anecdotes

    Basing a broad claim on personal stories, like saying a product is bad from one user's experience, without broader data.

48. 48

    Slippery Slope in Legal Arguments

    Predicting that a minor law change will lead to extreme results, like claiming speed limit reductions cause economic collapse.

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    Weak Analogy in Business Cases

    Comparing companies inaccurately, such as equating a startup to a tech giant based on one shared feature, ignoring scale differences.

50. 50

    Circular Reasoning in Definitions

    Defining a term using itself, like 'Corruption is when people are corrupt,' which fails to clarify or provide new insight.

51. 51

    Red Herring in Political Debates

    Bringing up unrelated scandals to avoid discussing policy, shifting focus from substantive issues.

52. 52

    Appeal to Emotion in Fundraising

    Using heart-wrenching stories to solicit donations without evidence of effectiveness, prioritizing sentiment over facts.

53. 53

    Post Hoc in Economic Trends

    Assuming one event caused a market shift just because it preceded it, without correlation analysis, leading to poor predictions.