In this task, you will be given two sentences separated by ", so". You should decide whether the first sentence can be the cause of the second sentence. If you can see a possible causation, answer with "plausible", otherwise answer with "not plausible".
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Question: The doctor x-rayed the patient's arm, so he knew what to do

Answer: plausible


Question: The man hated his new haircut, so he decided to get a new one

Answer: plausible


Question: The boaters set off a flare, so we didn't need too much

Answer:
not plausible