A new published report from international researchers marshals every line of evidence in defense of fairness in women’s sports.The International Olympic Committee (IOC) developed its 2021 framework on sex and “gender” around the concepts of fairness, inclusion, and non-discrimination. This framework leaves it to each sport’s governing body “to determine how an athlete may be at a disproportionate advantage against their peers.” However, they admonish sports organizations against “targeted testing … aimed at determining [athletes’] sex, gender identity and/or sex variations.” Instead, it’s up to each sport to “[provide] confidence that no athlete within a category has an unfair and...