Your use of the word gender is effectively "personality". Yes people have different personalities.
Yes XX is a woman and YY is a man. Mammals require one of each to reproduce. Creating a clear, simple definition is what science is supposed to do so that we can better understand existence.
When a woman can no longer have kids she has gone through menopause or had a genetic aberration that prevented her from doing so.
Yes there are bell curves within nature. This doesn't change chromosomes.
No I would not agree that hormones received from an external source make one male or female. If I color my skin green, my skin is still not green. I have simply made it appear that way.
Personality is an element of gender, but they are not synonymous. Even in your definition of men vs. women, there are people of all "personalities" in each "gender".
Yes, science classes chromosomes, and yes, one of each is (generally, let's not get too caught up in parthenogenesis) required to reproduce. Is that all you see in men v. women? You used reproduction as a determinant, but now you're saying that women who can't reproduce are still women because...they're supposed to be able to reproduce? That's not quite circular logic, but it's darn close.
Taking hormones is pretty far from "coloring your skin green" -- by your definition Arnold Schwarzenegger wasn't really as muscular as he was, or Lance Armstrong as fast as he was, because they took steroids/PEDs. It's easy to argue that they cheated, but hard to argue that they actually weren't as big/fast as they were.
Your argument seems to simplify to chromosomes. Of course you know that there are people born with neither XX nor XY. You can claim those people are "something else," but if they want to present as male or female, is that wrong? And I'll ask you the same question I posted in a separate comment: if we were standing in Times Square and I asked you to point out the women walking by, would you really say, "I can't until I get blood samples"?
Yes XX is a woman and YY is a man. Mammals require one of each to reproduce. Creating a clear, simple definition is what science is supposed to do so that we can better understand existence.
When a woman can no longer have kids she has gone through menopause or had a genetic aberration that prevented her from doing so.
Yes there are bell curves within nature. This doesn't change chromosomes.
No I would not agree that hormones received from an external source make one male or female. If I color my skin green, my skin is still not green. I have simply made it appear that way.