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FALLACIOUS REASONING RC 2. 8
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WHAT IS A FALLACY? A fallacy is an error in reasoning. It usually lacks evidence and makes erroneous claims.
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Fallacious Reasoning – Conclusion that does not make sense
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FALLACIOUS REASONING Premise 1: Most American cats are domestic house cats. Premise 2: Bill is an American cat. Conclusion: Bill is a domestic house cat
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ANOTHER EXAMPLE John is tall. All tall boys are good at basketball. John is good at basketball.
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There are different types of reasoning
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1. Factual Error – incorrect evidence
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FACTUAL ERROR The United States is in Africa. Los Angeles is the capital of California. Mrs. Costa is President of the United States.
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2. Inductive Reasoning – goes from specific to general
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INDUCTIVE FALLACY Just arriving in California, I saw a white dog. All dogs in California are white.
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ANOTHER EXAMPLE I encountered a rude person in New York City. All people in New York City are rude.
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3. Deductive Reasoning – Starts with a general assumption to specific
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DEDUCTIVE FALLACY If Chino is the capital of California, and it’s in California. Chino is the capital of California.
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ANOTHER EXAMPLE If drinking milk makes you taller, and I drink milk. I will grow to 6-7.
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Check 4 Understanding Get our your white board and let’s show what you know! Parents: The answers are listed in the notes section under regular view.
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WHAT IS THE FALLACY IN THIS AD? HINT, LOOK AT THE FINE PRINT
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WHAT IS THE FALLACY? My daughter was vaccinated. She was diagnosed with autism. The vaccination caused autism.
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