Practice Quiz

LSAT

Category - Logical Reasoning

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Jim went to his doctor after feeling very tired for a few days. The doctor told Jim he had either a bacterial infection or mononucleosis. He administered a mononucleosis test, but Jim tested negative. The doctor then wrote Jim a prescription for antibiotics.

Which one of the following most accurately describes the method of reasoning used by Jim’s doctor?
  1. An observation about one symptom is used to make a determination about a similar symptom.
  2. A generalization is reached by understanding a specific case.
  3. A conclusion is reached by ruling out all other possible explanations.
  4. A test is used to determine which of many possibilities is correct.
  5. A generalization is rejected because it failed to apply to a specific case.
Explanation
Answer: C - Jim’s doctor reached his conclusion by ruling out all other possible explanations. Jim’s doctor ruled out mononucleosis in order to determine that Jim had a bacterial infection.
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