Logical Fallacies Quiz

What is a logical fallacy?

• An error in reasoning that weakens an argument.

• A strong piece of evidence supporting an argument.

• A persuasive technique that always uses sound logic.

• A type of grammar mistake in writing.

Answer explanation

A logical fallacy is defined as an error in reasoning that weakens an argument. This means that the correct choice accurately describes what a logical fallacy is, while the other options do not.

Tags

CCSS.RI. 9-10.8

CCSS.RI.11-12.5

CCSS.RI.11-12.8

CCSS.RI.9-10.5

CCSS.RI.8.5

What is a Hasty Generalization?

• Using an authority’s opinion as proof.

• Inferring a broad claim from too little or unrepresentative evidence.

• Assuming that because B followed A, A caused B.

• Dismissing a criticism by accusing the opponent of the same thing.

Answer explanation

A Hasty Generalization occurs when a broad conclusion is drawn from insufficient or unrepresentative evidence, making the correct choice 'Inferring a broad claim from too little or unrepresentative evidence.'

Tags

CCSS.RI.8.8

CCSS.RI.8.1

CCSS.RL.11-12.1

CCSS.RL.8.1

CCSS.RL.9-10.1

David is trying to convince his friends to try a new diet. He says, “Dr. Smith says this diet works, so it must be true,” even though Dr. Smith is not a nutrition expert. Which fallacy is David committing?

• Appeal to Authority (Faulty Use of Authority)

• Hasty Generalization

• Slippery Slope

• Circular Reasoning

Answer explanation

The fallacy committed is an Appeal to Authority (Faulty Use of Authority) because it relies on Dr. Smith's opinion without considering his lack of expertise in nutrition, making the argument invalid.

Tags

CCSS.RI.8.8

CCSS.RI.8.1

CCSS.RL.11-12.1

CCSS.RL.8.1

CCSS.RL.9-10.1

Priya tells her friends, “Most people believe in astrology, so it must be true.” Which fallacy is Priya committing?

• Bandwagon

• Straw Man

• Appeal to Ignorance

• Slippery Slope

Answer explanation

The statement commits the Bandwagon fallacy, as it suggests that because most people believe in astrology, it must be true. This reasoning relies on popularity rather than evidence.

Tags

CCSS.RI.8.8

CCSS.RI.8.1

CCSS.RL.11-12.1

CCSS.RL.8.1

CCSS.RL.9-10.1

Olivia's teacher says, "If we let students redo one assignment, next they’ll want to retake every test, and soon grades won’t mean anything." Which logical fallacy is demonstrated by this statement?

• Slippery Slope

• Straw Man

• Ad Hominem

• False Dilemma

Answer explanation

The statement exemplifies a Slippery Slope fallacy, as it suggests that allowing one assignment redo will inevitably lead to extreme consequences, like devaluing grades, without providing evidence for such a progression.

Tags

CCSS.RI.8.8

CCSS.RI.8.1

CCSS.RL.11-12.1

CCSS.RL.8.1

CCSS.RL.9-10.1

Zoe says, "The new history textbook must be accurate because the district curriculum director endorsed it." This is an example of which fallacy?

• Appeal to Authority

• Straw Man

• Slippery Slope

• False Dilemma

Answer explanation

The statement exemplifies the Appeal to Authority fallacy, as it relies on the endorsement of the district curriculum director as the sole reason for the textbook's accuracy, rather than providing evidence of its content.

Tags

CCSS.RI.8.8

CCSS.RI.8.1

CCSS.RL.11-12.1

CCSS.RL.8.1

CCSS.RL.9-10.1

Which fallacy is shown in: "After the school switched to LED lights, our test averages dropped. The lights hurt performance."?

• False Cause

• Slippery Slope

• Bandwagon

• Appeal to Authority

Answer explanation

The statement assumes a direct cause-and-effect relationship between switching to LED lights and the drop in test averages without evidence, exemplifying the False Cause fallacy.

Tags

CCSS.RI.8.8

CCSS.RI.8.1

CCSS.RL.11-12.1

CCSS.RL.8.1

CCSS.RL.9-10.1

In a "straw man" fallacy, what does the speaker do?

• Misrepresents the opponent’s argument to make it easier to attack.

• Uses popularity as evidence for truth.

• Claims something is true because an authority says so.

• Assumes a cause-and-effect relationship without proof.

Answer explanation

In a "straw man" fallacy, the speaker misrepresents the opponent’s argument, simplifying it to make it easier to attack. This tactic avoids engaging with the actual argument, leading to a misleading debate.

Tags

CCSS.RI. 9-10.8

CCSS.RI.11-12.5

CCSS.RI.11-12.8

CCSS.RI.9-10.5

CCSS.RI.8.5

Rohan notices that every time he wears his lucky socks, his favorite team wins. He concludes that his socks are the reason for the team's victories. What is the main error in Rohan's reasoning?

• Assuming that because two events occur together, one caused the other.

• Attacking the person making the argument.

• Claiming something is true because an authority says so.

• Presenting only two options when more exist.

Answer explanation

The main error in a 'false cause' fallacy is assuming that because two events occur together, one caused the other. This overlooks other possible explanations for the correlation.

Tags

CCSS.RI.8.8

CCSS.RI.8.1

CCSS.RL.11-12.1

CCSS.RL.8.1

CCSS.RL.9-10.1

Jackson tells Priya, "You can either join a club or have no friends." What fallacy is this?

• False Dilemma

• Red Herring

• Bandwagon

• Slippery Slope

Answer explanation

The statement presents only two options: joining a club or having no friends, ignoring other possibilities. This is a False Dilemma, as it oversimplifies the situation by limiting choices.

Tags

CCSS.RI.8.8

CCSS.RI. 9-10.8

CCSS.RI.11-12.5

CCSS.RI.11-12.8

CCSS.RI.9-10.5