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QuestionPhilosophy

Which of the following is an example of the affirming the consequent fallacy? A. If A, then B. B is true. Therefore, A is not true. B. If A, then B. B is true. Therefore, A is true. C. If A, then B. B is not true. Therefore, A is true. D. If A, then B. A is true. Therefore, B is not true.
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Answer

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Step 1:
I'll solve this logic problem step by step:

Step 2:
: Understand the structure of the affirming the consequent fallacy

- The logical structure is: $$P \rightarrow Q, Q \therefore P
- The fallacy occurs when someone incorrectly concludes that if the consequent (B) is true, then the antecedent (A) must also be true

Step 3:
: Analyze each option carefully

Option D: $$P \rightarrow Q, P \therefore \neg Q
- This is NOT affirming the consequent - This statement actually represents a valid logical form - THIS IS the affirming the consequent fallacy - Just because Q is true does not guarantee P is true - Example: "If it's raining, the ground is wet. The ground is wet. Therefore, it's raining." (But the ground could be wet for other reasons) - This is a different logical fallacy (denying the consequent) - This is not a recognized logical fallacy

Final Answer

B is the example of the affirming the consequent fallacy.