The year is 2252. The newest, best, most comprehensive scientific study has just been published, finding no clear physical advantage for trans girls and women over their cisgender counterparts.
The study is backed by a nonpartisan scientific group, with an impeccable hundreds-of-years long record of nonbiased work; is wide ranging, with hundreds of thousands of participants including thousands of top-tier athletes as well as high-school and middle-school age minors, is double-blind, eliminating any possible risk of confounders and unintentional publication bias, and is generally hailed as a textbook example of exceptional scientific work. This is the landmark 10,000th such peer reviewed study in its field, all of which have yielded the same result.
Those who claim to respect science immediately announce their intention to prematurely ignore this study and renew their efforts to "protect women and children" by harming trans women and children because it's just "common sense".