Whatever the shielding model would be (religion or another shielding model), PSM will be blocked in case of the activation of a suicide model. The presence of an adequate shielding model can therefore block the PSM, which wants to stop the activation of the suicide model. A class of suicidal individuals consists of those people that after the disappearance of an entity included in their PSM (a very close person vanishes from their life), they are unable to correct the whole structure of models. The brain gets unstable, all-important models might become unusable and this can lead to suicide. Another class of suicidal individuals is that of those who have all their models blocked (associated with general depression). The person can see that he/she can't evolve anymore, the predictions are permanently the same, and i.e. there is no hope to get out of a certain situation. This can lead to suicide, but the brain needs to build on the spot a shielding model, in order to have a 'successful' suicide. If not, PSM will intervene at the last moment to avoid it. A classical example is when somebody who has a lot of money looses it all at once (the great depression in 1929 in USA, for instance). With all models blocked, the individual has no capacity to build new models adequate to the new external reality and suicide becomes an option. There is a special class of suicidal individuals, under 18. This can be associated to the fact that teenagers have a limited amount of long range models with lots of imperfections. These models are insufficiently developed to show the whole host of directions of evolution open. These models can easily predict a situation of generalised blocking, and from here, the tendency for suicide. It is clear that only a simultaneous generalised blocking could be a cause for suicide. We repeat that without an adequate shielding model, PSM will determine the insuccess of the suicidal attempt in the last moment. Obviously, there are persons who have psychiatric illnesses, as defined by this theory. In their case, additional factors will add up, associated to their illness. ETA 15: Normality tests Having defined schizophrenia and paranoia, we will describe two tests to detect these illnesses. T1 and T2 detect schizophrenia, and T2 alone detects paranoia. T1. In front of a complex external reality, an individual has to be able to realize if he/she has enough information to build a suitable model. From the general theory, we know that the brain will build harmonic/ logic models based on the available information. This is the problem: we don't know beforehand how many elements are there in the external reality. The models are built with what is available. We could not realize that we have not enough information to build a good model (see general theory: Defieciencies in the design of the brain). The test wants to verify is we can compensate this design deficiency.