medium · LSAT Logical Reasoning

The flight was either delayed by weather or by mechanical failure. The airline confirmed there was no mechanical failure. So it must have been the weather.

The reasoning in which one of the following is most similar to the reasoning in the argument above?

  1. Either it will rain or it will be sunny. It is raining, so it will not be sunny.
  2. The patient has either a viral or a bacterial infection. The test for the virus came back negative. Therefore, it is a bacterial infection.
  3. To reach the island you can take a boat or a plane. You took a boat, so you did not take a plane.
  4. You may have soup or salad. You chose the salad, so you cannot have the soup.
  5. The delay was caused by weather, and weather delays are common in winter, so winter delays are usually weather-related.

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