English Language Arts
Grade 8
15 min
Classify logical fallacies
Classify logical fallacies
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1
Introduction & Learning Objectives
Learning Objectives
Identify common logical fallacies in various forms of arguments.
Distinguish between valid reasoning and fallacious reasoning.
Explain how specific fallacies weaken an argument's claim or evidence.
Analyze argumentative texts to pinpoint instances of logical fallacies.
Construct arguments free from common logical fallacies.
Evaluate the credibility of sources by identifying fallacious reasoning.
Ever been convinced by an argument that just felt...off 🤔? Or seen someone try to win a debate with a trick instead of facts?
In this lesson, you'll learn to spot sneaky tricks in arguments called logical fallacies. Understanding these will help you become a sharper critical thinker, better at evaluating information, and more persuasive in your own wri...
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Key Concepts & Vocabulary
TermDefinitionExample
Logical FallacyA flaw in reasoning that weakens an argument, making it unsound or misleading, even if the conclusion seems plausible.Claiming 'Everyone believes it, so it must be true' is a logical fallacy because popularity doesn't guarantee truth.
Ad HominemAttacking the person making the argument instead of addressing the argument itself.Instead of discussing the policy, someone says, 'Don't listen to her economic plan; she's just a rich snob.'
Straw ManMisrepresenting or exaggerating an opponent's argument to make it easier to attack or refute.Person A: 'I think we should invest more in public transportation.' Person B: 'So you're saying everyone should give up their cars and walk everywhere? That's...
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Key Rules & Conventions
Focus on the Argument, Not the Person
When evaluating an argument, always assess the evidence and reasoning presented, not the character, background, or perceived flaws of the person presenting it.
This rule helps you avoid Ad Hominem fallacies, ensuring you engage with the ideas themselves rather than resorting to personal attacks.
Check for Relevance and Accuracy
Ensure all evidence and points directly support the main claim and accurately represent any opposing views. Be wary of diversions or mischaracterizations.
This helps you identify Red Herring and Straw Man fallacies by ensuring the discussion stays on topic and accurately reflects all positions.
Demand Sufficient and Representative Evidence
Be skeptical of claims that make sweeping statements based on only on...
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Challenging
Read the following blog post excerpt: 'The new city-wide composting program is a disaster. My friend tried it and her bin started to smell, which proves the system is flawed. The mayor who proposed it just wants to look good for the next election anyway. If we let this continue, the whole city will be overrun with pests and smells.' Which of the following fallacies is NOT present in the excerpt?
A.Hasty Generalization
B.Ad Hominem
C.Red Herring
D.Slippery Slope
Challenging
In a debate, your opponent commits a Straw Man fallacy by misrepresenting your position. According to the principles of logical argumentation, what is the most effective way to respond?
A.Calmly restate your actual position and point out how it differs from their misrepresentation.
B.Use an Ad Hominem fallacy to attack their character for misrepresenting you.
C.Create a Straw Man of their argument to show them how it feels.
D.Ignore their point and use a Red Herring to change the subject to one where you are stronger.
Challenging
A Slippery Slope argument like 'If we allow this video game to be sold, it will lead to a complete breakdown of morality in our youth' rests on what critical, unproven assumption?
A.That all young people play video games.
B.That the proposed first step is causally and inevitably linked to the final, extreme outcome.
C.That the person making the argument is an expert on youth morality.
D.That most people already agree that video games are harmful.
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