You have to be very careful and have everything thought out clearly before the argument begins. But even then she will try to throw in some kind of little twist to throw you off.
I did manage one time to win an argument with the lady and she even (reluctantly) admitted it. That left her scarred for life now.
My local pub has its toilets entered from the opposite corners at one end of a long room. On the intervening wall is a large enamel sign indicating which is which by these words:
" Gents to the Left, Women to the Right, Because women are always right! "