This language excuses the function of the sign. The trajectory of the disentailed thought of the language and trajectory of the language independem of the thought. In the filogentico development, these two trajectories if join and the thought if it becomes verbal and the rational language. We need this trajectory due to necessity of the individual during the human work. In the work we need instruments for the transformation of the nature and the planning, class action and the social communication. To act each better time, we must create a system of communication that in allow information exchange them specify and meanings shared for the individuals in the collective project. He is what mother-son happens with the children with some cognitivo deficit with the relation.
However with the sprouting of the verbal thought and language as systems of signs it is an important fact for the human, biological development that he changeds yourself into the partner-description. In the evolution of the individual, observing since its birth, we have a similar process that described one for the history of the species. Before the thought and the language if to join, if to associate, a phase exists in the daily pay-verbal child in the development of the thought and daily pay-intellectual in the development of the language. Before the language the child it has capacity to decide problems practical and to use mediators to reach, to obtain what it desires. For example, it goes up in the chair to catch definitive toy, or uses different forms to reach what it really longs for. Fellow creature to the Chimpanzee, the daily pay-verbal child, uses daily pay-verbal intelligence, uses intelligence practises without the use of the language. In this phase, while it does not dominate the language, it if it uses of other methods to communicate itself, either I cry for it, for the laugh, that serve for the social contact with diffuse communication with other people.