The fundamental fallacy of the “sex spectrum”

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The fundamental fallacy of the “sex spectrum”

While thinking about about objections to the sex binary—usually discussed in humans but sometimes in other species—they all seem to come down to a single assertion: “Sex is complicated in both development and expression, involving chromosomes, behavior, hormones, genitals and even psychology.  Therefore there are more than two sexes.” One example of this is from the deeply misguided anthropologist Agustin Fuentes, who has a book coming out about…