Some psychologists debate whether 'keen athletic' is a genetic trait. If it were a genetic trait there would now be generations of children with this special genetic ability. Sports federations feel it would be a great loss not to impart intensive training to those children at a very young age, so that they can reach their optimal performance. However, currently there are no methods to identify and accurately assess the potential of these genetically athletic children. Therefore, __________
What is the most critical completion of the passage?
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