Problem: On level 2, a possible problem is to consider one's own activity as a good one, and to consider that some other members of the group are low quality persons. This could happen with a non-homogenous group, but also it is possible that the model is a low quality one (the person has made a low quality model associated with the aims and the rules of the group). As we know, any model is made to be stable (logical or harmonic). We also know that the stability of a model is not a guarantee that the model reflects in a good way the external reality. Thus, for a good level 2 of consciousness, it is necessary that all the members of the group have about the same basic model. Observation: it is possible that faced with a new external reality, for which there is no available model, the PSM activates itself. As the PSM is activated, all the normal models are disabled and so the consciousness disappears. Such a situation is called "shock status". The consciousness returns only after the normal structure of models regains control. The highest level of consciousness is level 3. There are few persons who are able to reach level 3 of consciousness. It is not easy to understand the explanations associated with this level. On level 3, a person is able, e.g. to think with "the others' head". Also, on this level, a person is able to see how the others see him. This implies to make a model which contains the model of the group as an element in a longer- range model. On level 3, the brain has to work very hard. There are few person who are able to do such an effort. It is harder to do such an effort on image models than on symbolic models. Usually, level 3 of consciousness is met on symbolic models. However, the word "empathy" can be associated on image models, with a low level 3 of consciousness. Note: Level 3 requests a hard effort for a brain and at the same time, the personal advantage from such effort is not too high. Thus, the absolute majority of the population is on level 1 and 2. The persons able to stay on level 3 are the elite of a group. Example: let's see an example involving car driving. On level 1, a driver is reacting only when a situation occurs, or is about to occur. On level 2, a driver is able to predict what the other drivers will do beforehand. On level 3, a driver is able to understand every driver around him, and he is also able to take in account some possible problems, which can occur in association with the overall traffic problems. Of course, the best drivers are those on level 3, but the effort to stay on level 3 is so big, that, at some moments, the brain will not be able to do such an effort, and the driver "drops" on level 1, when he can cause accidents. This could be the explanation of some "inexplicable" accidents, with persons who are considered as very good from a professional point of view. Of course, this is a very general problem; it is not related only with car drivers.