I have been looking for a scientific back-up †̥ support this all this while and up till now, I have not got the answer. people that are identical in the family are not always on  same side: any son that is a carbon copy of his father will always fight, so also ladies with their mothers. The worst of it is brother †̥ brother and sister †̥ sister that are identical. Please can anybody with a G̶̲̥̅Ơ̴̴̴̴͡.̮Ơ̴̴̴͡D̶̲̥̅ insight on this topic share their knowledge and experience? Thanks