It's important to stress that this should _not_ be taken to mean that transgender identities should necessarily be rejected! (Bad arguments can be made for true propositions just as easily as false ones.) As Alexander briefly alludes to late in the post ("I could relate this [...] to the various heavily researched apparent biological correlates of transgender"), a _non_-question-begging argument for accepting trans people as their target gender would appeal to the ways in which this is really is a natural categorization.
The pre-verbal, subconscious, [System 1](https://en.wikipedia.org/w/index.php?title=Dual_process_theory&oldid=820860981#Systems) process by which we notice someone's features (breasts, facial hair, voice, facial structure, gendered clothing or grooming cues, any number of [subtle differences in motor behaviors](https://sillyolme.wordpress.com/2010/09/24/all-the-wrong-moves/) that your perceptual system can pick up on without you being consciously aware of them, _&c._), mentally categorize them as a _woman_ or a _man_, and use that category to guide our interactions with them, isn't subject to conscious control—but, for most purposes in day-to-day public life, it's also not _directly_ focused on genitalia or chromosomes.
It's important to stress that this should _not_ be taken to mean that transgender identities should necessarily be rejected! (Bad arguments can be made for true propositions just as easily as false ones.) As Alexander briefly alludes to late in the post ("I could relate this [...] to the various heavily researched apparent biological correlates of transgender"), a _non_-question-begging argument for accepting trans people as their target gender would appeal to the ways in which this is really is a natural categorization.
The pre-verbal, subconscious, [System 1](https://en.wikipedia.org/w/index.php?title=Dual_process_theory&oldid=820860981#Systems) process by which we notice someone's features (breasts, facial hair, voice, facial structure, gendered clothing or grooming cues, any number of [subtle differences in motor behaviors](https://sillyolme.wordpress.com/2010/09/24/all-the-wrong-moves/) that your perceptual system can pick up on without you being consciously aware of them, _&c._), mentally categorize them as a _woman_ or a _man_, and use that category to guide our interactions with them, isn't subject to conscious control—but, for most purposes in day-to-day public life, it's also not _directly_ focused on genitalia or chromosomes.