" And who can speak more authoritatively of what it is like to inhabit the middle ground between biology and culture than gender-variant people? An individual who has inhabited the social roles of both and and woman, with all the cultural baggage that accrues to both states - or to neither- acquires a kind of gender gnosis: a secret knowledge denied the rest of us who live in our assigned boxes, M or F, with really probing the boundaries. "

― , The Riddle of Gender: Science, Activism, and Transgender Rights