"This kind of science can only take you so far," said Ginsburg, who has also played and coached soccer. "There are an enormous number of factors that go into this."

曾经也踢过足球并当过足球教练的金斯伯格说，这类的科学研究能做的也就只能到这了，比赛中存在着太多的因素影响，而这些也将永远是比赛中未知的变数。