XX, XY, other -- It's a simple blood test - not a "pronoun" you get to choose inflict upon others depending on which way the wind blows out of your wherever that day.

XX: good to go! Please board the bus to the FEMALE barracks.

XY: good to go! Please board the bus to the MALE barracks.

Other: thanks for applying, but we don't have the resources to expend on your special physical and mental care. Ask the special folks with psoriasis how they serve humanity, OK?

Simple, see?

XX + XX = FAIL

XY + XY = FAIL

XX + XY = Human