Tannehill’’s stuff begins by overlooking that the rule that allowed trans athletes to compete as women from 2004 made full genital surgery compulsory. 80% of MtF transpeople retain their male genitalia. Those that do have the surgery often have it later in life, ie, after the point of a viable athletic career.
The 2015 rule change does away with the surgery rule, Instead it requires (at least) two recorded testosterone levels, 1 year apart.
We haven’t yet had an Olympics that feasibly allows trans competitors under this new rule, and it’s this rule that female elite athletes are protesting against.
Failure to set this out means the rest of Tannehill’s argument is presented disingenuously.
Try Dr Fond of Beetles or FPFW instead:
fondofbeetles.wordpress.com/posts/
fairplayforwomen.com/sports-campaign/