Some truths don’t require a laboratory study or a government commission. They simply need eyes willing to see. For years now, anyone who dared suggest that biological males hold inherent physical advantages over females in athletic competition has been labeled a bigot, a science-denier, or worse. The activists insisted that hormones could level any playing field, that strength and speed differences were merely social constructs waiting to be dismantled by the right policies and enough sensitivity training. Meanwhile, coaches knew better. Athletes knew better. Parents watching their daughters get steamrolled by competitors with shoulders like linebackers knew better. But acknowledging...