“If you look at all the variables in nature that are saidto determine human “sex,” you can’t possibly find one that will unequivocally split the species into two. Each of the so-called criteria of sexedness is itself a continuum—including chromosomal variables, genital and gonadal variations,reproductive capacities, endocrinological proportions, and any other criterion you could think of. Any or all of these different variables may line up in any number of ways, and all of the variables may vary independently of one another.”