Based on the standard practice of referees in sporting activities, some items that a referee can work on to help make clear, confident, and consistent decisions include "not dwelling over a mistake made during the game."
A Referee in sporting activities is an official of the game who watches a match keenly to arbitrate on the game's rules and make sure the rules are adhered to.
Hence, in this case, it is concluded that being a referee requires some specific skills.
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