Based on the information given, the reason for the repetition will be to stress out a particular point.
It should be noted that repetition simply means a literary device that has to do with using the same word or phrase continuously in a speech or literary work.
Your information is incomplete. Therefore, an overview will be given. In this case, the main reason that Konnikova repeated the rejected titles for her article that she used at the beginning of the article in her conclusion will be to stress out a particular point.
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