Using the same science as was used to determine that the Welsh are in fact a superior race, K.M.W University has funded a study on chromosomal dysfunction and our scientists have determined this.
History has seemed to prove that all men and woman are mentally unstable. And one thing that all men and women share is an X chromosome. So this being the common factor, it must be the source of all instability.
As such, women therefore must be twice as unstable. However, this is not to say that men are, by default, better than women. This simply cannot be, as men have the Y chromosome. Examine, if you will the Y chromosome. It is very much similar to the damned X chromosome. Although it would appear that it is simply missing its lower right foot.
Ergo, true scientists such as those working at K.M.W University, must deduce that women are completely mentally unstable, whereas men appear to be half unstable and half retarded.