 For a mesology of learnance 
The article questions and distinguishes the notions of environment and « milieu » from a triple geographical, phenomenological and biological perspective. It shows how the way of considering « what surrounds us » or « what constitutes us » induces radically different practices on the part of the designer of a training. It draws on augustin Berque’s work on mesology or study of « milieu » to point out the pedagogical issues of individualization in the learner’s relationship to the activities he carries out to learn. The understanding of the « milieu » as a conjunction of an individual singular experience co-extensive to the transformation of the conditions of realization of these is at the heart of the analysis.