How do women really think they are smarter then others

Just trying to understand how women think these days. How can a woman think she knows everything and thinks she is smarter than everyone else as well? I know this isn't the place to broadcast everything, but it is my page and my thoughts. My son's wife which him and her has been separated since September 2008 and they are still legally married. She has been trying to do everything she can to destroy him and to get things her way, in which it hasn't been going the way she wants it to go to. She is a constant liar and tries to get people to turn against one another. She really thinks she is a good mom but isn't. I won’t go into details cause like I said these are my thoughts and everyone shouldn't know everything.......