Complex systems naturally behave complexly, so being genderqueer is just as “natural” as being cisgender. And for me, given what we now know about human brains, the idea that “girlhood” (that is, childhood brain development as a female-identified person in a sexist society and the accumulated, influential, remembered experiences associated with those years) might be one of the driving features of the rather odd set of things that happen to so many adolescent girls’ cognitive test scores is both true and ultimately freeing.