I would agree with that. I know there is likely a biological component but I'm not sure if it's as straightforward as "brain-sex" because brain sex either doesn't explain people who don't fall under male or female identities or in the worst case claims they're faking it (Transmedicalists love this argument). Also Brain-sex falls flat on its face when it comes to describing gender fluidity.

Yep and I never understood the idea, it just seemed weird to me. People always said to me that you can just feel your gender but I don't feel a gender or know what it would feel like. That's how I found out about being Agender, well it was after I found out about being AroAce and I wondered if the A- prefix could apply to gender, and it does.

Unless you used Ubuntu 32 bit, then they'll just drop you like a sack of potatoes, in that regard Canonical is no better than Google