Well, jeez Seawytch, the discussion is about how to treat them. If we have a sure fire method of identifying this rare issue, then finding out that someone who might have some issue, doesn't have THIS issue, and thus should not get treatment for THIS issue,
is just good medicine.
BUT, no surprise, your not interested in that. You want to point to the "science" and still let any man that says, "i'm a girl", have society play along, whether or not they really have the issue.
Thus, we see that all your talk of "science" is after the fact bs, that you cherry picked to support your ideological conclusion.