The two pending Supreme Court cases on state laws that protect women's sports are easy: The challenged laws define who may play in girls’ and women’s sports on the basis of sex, not on the basis of gender identity. Rather than discriminate on the basis of gender identity, they disregard gender identity. Boys can’t play on girls’ teams, and that’s true both for boys who identify as male and for those who identify as female. These rulings ought to be unanimous. 1/