Disclaimer: I'm not trans, so take this with a pinch of salt
Technically speaking, nonbinary is under the trans umbrella, which is a catch-all of "identifies as a gender they were not assigned at birth". Since nonbinary people fall under that, I say yes.
As a person who is the typical definition of trans…
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I agree with Jyn. Trans isn't specific, it's an umbrella that encompasses literally anyone who has a different gender from their physical sex. Even Non-Binary is an umbrella.
I include them.