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Recently, in cognitive sciences the debate moved on from the analysis of the inner procedures of mental events to the analysis of the way the sapiens know and represent the world through the evolutionary and biological perspective. the biological approach to the study of human language implies a significant change to the way we can interpret language: a set of biological constraints that made language a cognitive function which represents the world. In this paper we show both that some aspects of linguistic ability are present in many animal species that are not necessarily close to sapiens, and that some biological traits can be considered as specific constraints to the production of articulated language. These constraints represent a ratchet for language implementation.