I actually agree with you in broad terms Bleys, because what you said is basically the same argument I use against determinism. But I don't think the brain is so completely divorced from predictability as to make the... discipline, shall we say - of psychology an entirely futile and useless one. Many people in treatment for any sort of mental issue are likely to go through quite a few of them before the 'best fit' is found, but it does seem to be at least somewhat better than complete guesswork, in my experience; it has been very far from perfect but it has, on balance, been superior to nothing at all. I appreciate that yours was different and that leads you to a different conclusion.