Example: A man wants to buy a very expensive car. Lacking money, the action model can't be activated. This man is unhappy. Another one wants to buy a pencil. He succeeds to do it, and as such, he is happy. Disharmonic people move society forward. They are essentially unhappy people. If they succeed in the end to do what they wished for, soon their disharmonic structure will make them build other action models which are not suitable to external reality and the cycle restarts. ETA22: Subliminal messages When external reality changes, the local ZM won't make good predictions and the brain will in consequence look for/build a new model suitable to the new external reality. However some time to react is needed. In the case of subliminal messages we have an image which will produce a new M-model. This will have to activate a ZM-SL (SL= subliminal), but before the activation of the new ZM-SL, the dominant external reality will reappear, which will immediately reactivate the initial ZM. Thus ZM-SL has time to be built, but will not be activated. This will have the effect on a person as an idea or tendency to something, without an explicit reason. Of course these thoughts influence methods can create big disorders in the structure of models of a given brain, as some half-elaborated models have to be integrated in the normal structure of models. ZM-SL can become illegal models. This is why subliminal messages are forbidden, at least in advertising, all over the world. ETA23: How a positive science works A positive science is a symbolic model (SM) integrated in GCL, which is associated to an external reality. Let's explain this statement. 1. The existence of a fundamental symbolic model called General Communication Language (GCL) is supposed. This symbolic model contains absolutely all words, together with their definitions. The definitions can be more or less precise, logically consistent or not, can be or not accepted by some or others. GCL is the common language formed spontaneously between people in their inter-relations along the milleniums. 2. We choose a word (term) T from GCL. 3. Let's suppose that there is a positive science SM, that could include the term T. 4. The term T, that should be studied by SM, has to be included in SM. For this purpose, T has to be redefined within the frame of SM. SM can integrate a new term only if this term is defined within SM. Thus T will have one definition in GCL and another generated by SM. Example: The term 'force' has one definition in GCL and another in Newton's Mechanics. The predictions of Newton's Mechanics refer only to the term 'force' as it had been defined within Newton's Mechanics.