In this way, for example, the argument of that ' ' politicians carry through its action in sight of the well biggest one of sociedade' ' it is a derivation, which plays an important role in the systems politicians. The derivations are the elements which characterize the human being, therefore they synthecize the mixture between logical actions and action not-logics, and that the human beings are only capable to carry through, for being rational. Of a side, if the men acted only for the instinct as the other animals, would not have derivations, therefore he would not have the possibility of reasoning on its acts and feelings; on the other hand, if the men were purely rational, the derivations would not be necessary to guide and to motivate its action. For this the logical-experimental theories would be enough. ' ' It can be said that the man is an ideological animal because it is a instinctive being capable (and desirous) to reason. Or, inversely, it is a rational being dominated by instintos' ' (BOBBIO, 1957). The human being has the capacity and necessity to reason, and from these reasonings it makes impracticable the direct access to its instincts and feelings.
In its action, therefore, as many derivations meet how much residues, these hidden under a rationality mask. The derivations, for Pareto, are the theories that can be deceptive, formulated and used with the intention to coat, with logical character, the actions not-logics them men with the purpose to become them acceptable as true theories to that they do not analyze them with bigger discernment and, therefore, do not perceive that the real reason of the action masked for one is given to logical explanation or pseudo-logic. This last one is that it hides the motivation not-logic of these theories, which would have as real motivation the feelings of produces who it.