We answered this 6 pages ago. What is biologically male?
The whole point of the IAAF ruling was set the metrics for "what is the division between men and women in sport?"
If it were as easy as you think it is, we wouldn't be here. Why can people not get this?!?!?
LRC is bad for my health.
Semenya is biologically male but (supposedly) raised as a female.
The division between male and female is almost always very clear-cut - except with a few transgender individuals or the tiny minority of those who are DSD. Their male biological characteristics, that are reflected in mucher higher than female levels of testosterone, require that in fairness to their fellow competitors they can now only compete as females on the same basis as non-DSD women, by reducing their levels of testosterone. That isn't so hard to get, either.