- * *Claim*: Trans people are born with a brain-restricted intersex condition such that their psychology is much more typical of the other physiological sex: the proverbial "woman trapped in a man's body" (respectively "man ... woman's") trope is basically accurate.
- * *Claim*: The medical interventions undergone during transition—hormone replacement surgery, sex reassignment surgery, _&c._—are effective at inducing the phenotype of the other physiological sex: physically, transitioning _works_.
- * *Claim*: Gender is mostly attributed on the basis of apparent secondary sex characteristics: in most situations, most people don't care about predicting the configuration of someone's genitalia at birth or whether they have a Y chromosome.
- * *Conclusion*: Trans people can legitimately be said to belong to their stated gender, using the _same_ criteria people usually use to decide such things.
+So a natal female who presents to the world as a man, and whom other people _model_ as a man on a System 1 level with no apparent incongruities, might be said to be a man in the sense of social gender (but not in the sense of "biologically male adult human"), because that's the mental category that people are actually using for him, and therefore, the social class that he actually functions as a member of. Essentially, this is the argument that offers a photograph of a passing trans person, and says, "C'mon, do you _really_ want to call [this person](https://en.wikipedia.org/wiki/Buck_Angel#/media/File:Buck_Angel_Headshot.jpg) a woman?"