Re: https://lost-in-transition.tumblr.com/post/163866816634/regarding-definitions-of-sex-and-gender I thought a bit further while bicycling and realize one can simplify a “sensible” gender definition further still. Essentially, the social construct divides such that 1) individuals with anatomy/genetics/history X/Y are included in gender X’/Y’ unless they opt-out, 2) individuals without anatomy/genetics/history X/Y are included in gender X’/Y’ in case they opt-in, 3) vice versa, 4) X’/Y’ inherits labels and descriptors from X/Y and from the distributions of features x/y/etc. in X’/Y’ as resulting.