Learning Target:
I will identify instances of logical fallacies and justify my choice using evidence from the text and key characteristics from the definition.
Opening Activity
Matching: Match the name of the logical fallacy to the "mathy" expression of the logical fallacy.
a) If A says B, and A is famous or supposedly an expert, than you must believe B.
b) Because so many people believe A, A must be valid c) If A says B, and A is a horrible, no-good, rotten salsa dancer, than B must be wrong. d) If I want A, I’ll throw in Z to throw you off. e) If A happens, then B will happen, and C, and D, and E, and you won’t believe how extreme F is. f) Do A or you will cause B. g) If it is true for A, it must be true for B through Z. h) I want you to believe that A = B (even though it really isn’t that similar). i) If A happens after B occurred, then B must have caused A. |
1. Ad Hominem
2. Hasty Generalization 3. False Cause and Effect 4. False Dichotomy 5. Red Herring 6. Appeal to False Authority 7. Slippery Slope 8. Weak Analogy/Careless Comparison 9. Bandwagon |
Instruction Through Modeling: How to Justify an Identification
In this clip, Karen is making the logical fallacy of hasty generalization. By definition a hasty generalization makes assumptions about a whole group of people based on a small or incomplete sample. In this particular instance, Karen's thinking went wrong because she assumes that all inhabitants of Africa are black because that is probably all she has seen. Her limited understanding of the world lead her to make a hasty generalization.
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The speaker is making the logical fallacy of ad hominem, or personal attack. By definition, ad hominem is when the speaker attacks the speaker character instead of the evidence at hand. In this example, the speaker's argument went wrong when he essentially calls Holmes a social loser and suggesting that he has a drug problem when the speaker should be focused on the testimony about the evidence.
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