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Quiz: Critical Thinking, Logical Reasoning, and Fallacies

Test your understanding of critical thinking habits, logical reasoning, annotation, rhetorical analysis, and seven key logical fallacies.

1. A politician argues: "Senator Johnson has been arrested three times, so her proposal to reform the tax code is clearly wrong." This statement is an example of which logical fallacy?

  1. Ad hominem
  2. Straw man
  3. Slippery slope
  4. False dichotomy
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The correct answer is A. An ad hominem fallacy attacks the person making the argument rather than engaging with the argument itself. Pointing to Senator Johnson's arrest record to dismiss her tax code proposal attacks her character without addressing the merits of the policy. Straw man (B) misrepresents an opponent's argument. Slippery slope (C) claims one step inevitably leads to extreme consequences. False dichotomy (D) presents only two options when more exist.

Concept Tested: Ad Hominem Fallacy

2. A debate opponent argues: "My opponent wants to cut the military budget by 5%." The speaker responds: "My opponent wants to eliminate our national defense entirely and leave us vulnerable to attack." This response is an example of which fallacy?

  1. Circular reasoning
  2. Straw man
  3. Hasty generalization
  4. Appeal to authority
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The correct answer is B. The straw man fallacy involves misrepresenting an opponent's argument in a weaker or more extreme form and then attacking that distortion rather than the actual argument. The opponent proposed a 5% cut; the speaker falsely characterized this as total elimination of defense. The original argument is replaced with a "straw man" that is easier to knock down.

Concept Tested: Straw Man Fallacy

3. An editorial argues: "Either we implement this specific immigration bill immediately, or our country will be overrun by crime within a year." This argument commits which logical fallacy?

  1. Slippery slope
  2. Circular reasoning
  3. Hasty generalization
  4. False dichotomy
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The correct answer is D. A false dichotomy (also called false dilemma) presents only two options as if they are the only possibilities when in fact other alternatives exist. This argument excludes the many other immigration policy options between "pass this exact bill" and "be overrun by crime." Slippery slope (A) chains events toward extreme consequences. Circular reasoning (B) uses the conclusion as its own premise.

Concept Tested: False Dichotomy

4. A headline reads: "Celebrity Doctor Says New Supplement Cures Anxiety." A critical thinker should be most alert to which potential problem with this claim?

  1. The claim uses ethos without supporting logos, and "celebrity doctor" may not indicate genuine expertise in the specific area
  2. The claim is an example of pathos because it generates hope in anxious readers
  3. The claim commits the straw man fallacy by misrepresenting medical research
  4. The claim is an example of kairos because it exploits current anxiety about mental health
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The correct answer is A. This is a potential appeal to authority fallacy — citing a "celebrity doctor" conflates celebrity fame with scientific expertise. Being famous and being a doctor does not establish that this person has genuine expertise in anxiety pharmacology or that the supplement claim is supported by peer-reviewed research. The other options misidentify or misapply rhetorical concepts to this scenario.

Concept Tested: Appeal to Authority

5. A student argues: "Social media is harmful to teenagers because it harms them." This argument exemplifies which logical fallacy?

  1. Hasty generalization
  2. Ad hominem
  3. Circular reasoning
  4. Slippery slope
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The correct answer is C. Circular reasoning (also called begging the question) is when the conclusion of an argument is used as one of its premises — the argument restates rather than supports the claim. "Social media is harmful because it harms them" simply repeats the claim in slightly different words without offering any actual evidence or reasoning.

Concept Tested: Circular Reasoning

6. A student surveys five of their classmates about their study habits and concludes: "Teenagers in America don't study on weekends." This reasoning commits which fallacy?

  1. Hasty generalization — drawing a broad conclusion from an inadequate sample
  2. False dichotomy — presenting only two possibilities about weekend study habits
  3. Slippery slope — assuming the trend will continue to an extreme
  4. Ad hominem — attacking the students' character rather than their habits
Show Answer

The correct answer is A. Hasty generalization involves drawing a sweeping conclusion from a sample that is too small or too unrepresentative to support it. Five classmates from one school is far too limited a sample to justify conclusions about all American teenagers. The other fallacies do not apply to this pattern of reasoning.

Concept Tested: Hasty Generalization

7. An editorial argues: "If we allow students to revise their essays once, they will want to revise them endlessly. Then they'll expect to revise every test, then retake every exam, and eventually no grade will ever be final." Which fallacy does this argument commit?

  1. Straw man
  2. Circular reasoning
  3. Slippery slope
  4. Appeal to authority
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The correct answer is C. The slippery slope fallacy assumes that one step will inevitably lead to a chain of increasingly extreme consequences, without evidence that those subsequent steps are likely or inevitable. Allowing a single revision opportunity does not logically necessitate the elimination of all final grades. The argument presents a chain of escalating consequences as if each step is inevitable.

Concept Tested: Slippery Slope Fallacy

8. CRITICAL THINKING, as defined in this chapter, is BEST understood as which of the following?

  1. A natural personality trait that some people have and others do not
  2. A set of learnable skills — habits of mind cultivated through deliberate practice — for evaluating reasoning and evidence
  3. The ability to read and write at an advanced level without making grammatical errors
  4. The capacity to disagree with authority figures and established conventions
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The correct answer is B. The chapter explicitly defines critical thinking not as a personality trait (A) but as a learnable, teachable set of skills — habits of analytical mind developed through practice. It is not synonymous with advanced literacy skills (C) or with contrarianism (D). The key insight is that critical thinking can be taught and improved.

Concept Tested: Critical Thinking

9. When annotating a difficult informational text, a student writes in the margins: "What's the source for this statistic?" and "Who exactly is 'we' here?" What type of annotation most accurately describes these notes?

  1. Vocabulary annotations — noting unfamiliar words for later lookup
  2. Structural annotations — tracking where the argument shifts direction
  3. Question annotations — recording genuine analytical questions about specific moments in the text
  4. Connection annotations — linking the text to prior knowledge from another class
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The correct answer is C. These marginal notes are question annotations — specific questions prompted by specific moments in the text ("what's the source?" and "who is 'we'?"). These questions commit the reader to seeking answers and represent active critical engagement. They are not vocabulary notes (A), structural tracking (B), or cross-text connections (D).

Concept Tested: Annotation and Marking

10. Rhetorical analysis of a text involves which of the following analytical moves?

  1. Summarizing the text's content accurately and neutrally without evaluating its effectiveness
  2. Comparing the text to historical events to assess whether its factual claims are accurate
  3. Rewriting the argument using stronger evidence to make it more persuasive
  4. Identifying the author's use of rhetorical strategies and analyzing how those choices work to achieve the author's purpose with a specific audience
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The correct answer is D. Rhetorical analysis examines how a text is constructed — the rhetorical strategies, appeals, diction, structure, and choices the author deploys — and analyzes how those choices serve the author's purpose with their intended audience. It is not summary (A), fact-checking (B), or revision (C). The question is always: how does this text work, and why?

Concept Tested: Rhetorical Analysis