[Serious] Please convince me gender is binary

[Shell B]

Honestly, I don't really experience gender identity problems myself. Therefore, I am inclined to look at it as binary too, but that's the point. That's only my experience. Lots of people are saying they fall on a spectrum between femininity and masculinity. They sure behave like they do, so I'll take their word for it. There's nothing in my life experience that I could turn to for evidence, so I have to trust that people know how they feel about themselves.