>> The BBC article doesn't seem to claim that there is no genetic advantage. I learned from it that there is some gray area in biological gender. I understand

>> The BBC article doesn't seem to claim that there is no genetic advantage. I learned from it that there is some gray area in biological gender. I understand the BBC article to also make it clear that there is no test for "genetic advantage". If there were such a test then we could separate athletes to "advantage categories" so that all the athletes with the same kind of advantage compete with each other. Rather what we have is broad categories of weight and gender where different athletes have different strengths and weaknesses, where the majority of them have some kind of genetic advantage over the average non-athlete of their gender and weight, and where there are very often athletes who are clearly head and shoulders above the competition in every which way; and probably without doping.