Toward a nonbinary model of gender/sex traits

I argue against the exclusive female/male divide, referring to the phenomenon of epistemic injustice in the cases of people with nonbinary gender identities and people with intersex traits. Such people have traits that are counterexamples to the binary female/male model. I have separated female and male traits into nine basic layers, five of which belong to sex (chromosomes, gonads, internal sex organs, external genitals, and secondary sex characteristics) and four to gender (gender identity, legal gender, external gender presentation, and gender pronouns). In every layer, I have found traits that are neither female nor male, and the application of the model to individuals provides examples of clusters of traits for which one layer is male and another female. Such traits and clusters of traits create the category of the nonbinary. Table 1 provides a sketch of a nonbinary model. The nonbinary category takes its name from the existing category of nonbinary gender identity; however, in the current model, it is a third category of traits, not of people. Under the nonbinary model, the basic gender concepts do not disappear. S is a woman if S is a human being with enough female traits, and the trait of having self-determined female gender identity is sufficient but not necessary.