Some doctors believe that a certain drug reduces the duration of episodes of vertigo, claiming that the average duration of vertigo for people who suffer from it has decreased since the drug was introduced. However, during a recent three-month shortage of the drug, there was no significant change in the average duration of vertigo.Thus, we can conclude that the drug has no effect on the duration of vertigo.
Conclusion A confusion is created in the argument , first by saying "certain drug
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Conclusion A confusion is created in the argument , first by saying "certain drug
...
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