In considering whether a transwoman should compete in women’s sport the wrong question is consistently posed. The question routinely posed is whether or not a transwoman is a woman but this is not how or why sport is segregated into different classes.
#bidenerasingwomen

Some sports are not segregated at all (e.g. equestrianism), some sports are segregated by sex (e.g. athletics & swimming) and some by both sex and weight (e.g, judo, boxing etc). The question posed is whether one or more classes of persons has an unfair advantage over others.

In deciding whether a sport should be segregated by sex the question is whether a person falling within the male class has an unfair advantage over those in the female class. The two sexes are the relevant classes in this comparison.

In deciding whether a sport should be segregated by weight the question is whether someone who falls in a higher weight class has an unfair advantage to someone who falls in a lower weight class. Both sexes are segregated in this way. In this case there are many classes.

The relevant question is whether one class or classes have an advantage over another. So in considering whether transwomen should compete with women in the same sports category the question is not whether or not a transwoman is a woman.

The question is whether transwomen as a class have an unfair advantage over natal women. The test is to compare the average person in each class.

There is significant evidence that transwomen have an unfair advantage over natal women. From height to limb length, from pelvic tilt (longer stride) to hand and foot size, from larger hearts & lungs to muscle mass & distribution and a higher percentage of twitch fibres.

The argument is not about excluding transwomen from sport It is about objectively evaluating relevant factors (as is done for other classes) and asking the question do transwomen as a class have an unfair advantage over a natal women as a class and the answer must be yes.

To conclude otherwise is to ignore the reasons why sport is segregated in the first place and to conclude that what matters is not the objective consideration of the factors that lead to segregation of sport but how one identifies and whether that is validated.