But that's a definition that hinges on sex, so it's not at all independent. If you were to remove the correlation to sex, 'subjective feeling of identity' is essentially just subculture, so hipster, goth and skater would also be 'genders'.
It's not that complicated a concept. Even kids can understand it quite well and there's plenty of information available when you decide that you want to actually learn instead of trying to debate your way into confirming your own opinions.
> It's not that complicated a concept. Even kids can understand it quite well
Children will also readily believe in Santa Claus and the Easter Bunny if their parents tell them that they exist. That's not an argument.
Your assertions are prima facie undecidable, and it's not merely that you're unwilling to defend them — you cannot defend them.
But seeing as you had to trot out the generic, condescending 'go educate yourself', I'll just assume you simply don't know.