finally: a man has a Y-chromosome, a woman doesn’t. THE END.
Two women claiming to be the parents of a male child is idiocy incarnate. Neither can impart a Y chromosome to the child. There is always a male involved, either directly or by artificial insemination.
Any woman claiming to be a man is also the height of idiocy, since they can never produce a Y chromosome.
Any man claiming to be a woman is again idiocy, since he will always have a Y chromosome.
“finally: a man has a Y-chromosome, a woman doesn’t. THE END.”
That would be the proper scientific way, something that can be verified hundreds of years hence, with complete certainty.