Well this is the problem I'm pointing to, the slipppery slope that imprecise language creates.

I'd argue that there *is* only one criterion for determining gender and it's the way that the person naturally wants to express themselves. So not far from this definition.

But this has absolutely nothing to do with biological sex, which is the issue when it comes to sport. Deeply held beliefs or internal identities don't change your body. But if we talk about identity with the same language we use to talk about bodies, then we're bound to end up getting confused.