The CAS ruling was not about what sex Semenya is or what gender she identifies with. Yet that red-herring is what the critics of the Court's decision hang their hats on. They duck the core issue, which is whether male levels of testosterone in female sport fundamentally changes the nature of the competition. The Court says it does.
Then there are those who argue in great detail that the research the Court relied upon is flawed, choosing to ignore what is before their and our own eyes, which is the glaringly obvious gulf between male and female sport, produced - we know - substantially by sex differences in testosterone. Reality does not exist for some unless research says it does.
By the Court's decision Semenya is not denied the right to continue to compete in her sport; but she cannot now do so with an advantage that only those born male can have. As hard as it is for some to accept, the Court came down on the side of fairness - to all women, not just one.
In the end it is quite irrelevant what Semenya identifies with. The issue is solely a biological feature she possesses that is denied her fellow competitors - ironically enough, because of their gender. They do not have male levels of testosterone and the Court has accepted that for athletes like Semenya, much higher than normal female levels of testosterone constitute unfair advantage in a restricted category such as female sport.
Only those consumed by their political agenda - which has nothing to do with sport - refuse to see that. In their simplistic and over-generalised view of what constitutes "female" - for them it is enough to "identify" - they would sacrifice women's sport to that agenda.