" But it has not been known what advantage intersex variations have. Nobody had done any science on intersex athletes as few of them existed until a decade or so ago. It is not robust enough to say 'it's obvious' for it to be a truth, a known fact. Research had to be done"
Nonsense, in fact.
There are a few points here:
- XX people are shorter, for various reasons
- XY people are stronger, because of testes.
Caster Semenya has testes, and processes testosterone.
There is no possible research however that can prove statistically that Caster Semenya has an advantage with a given DSD, given that said DSD is too rare to perform any sort of controlled study on
The evidence of that has been presented to the courts in the form of a study purporting to show that extra testosterone is advantageous only in certain events,.and therefore that XY 'women' should restrict their testosterone, is little better than fraudulent. Even someone with very basic understanding of statistics could see that when your 800m dataset includes multiple XY athletes with functioning testes, then that is going to distort results. Equally I don't give a flying fuck whether a woman who has double the testosterone of another woman, but still just 5% of Caster Semenya's level, is faster or slower.
The so-called science showed nothing more than their being no correlation between athletic performance and a high or low female.level of testosterone. They only got anywhere because their dataset includes biological males.
If you don't accept as a starting point, and without the need for supposed science that you take on face value, that people with functioning testes, producing testosterone, THE performance-enhancing steroid, do not belong in female sport, well you have a problem with logic.