Des logiques en psychiatrie. Application, paradoxes, réunification

Logic sets down a fundamental problem in psychiatry on account of its field and mode of application, and because of the tool of thought used. Consequences result from it concerning the relations between form and contents, as well as between theories and practice. After having reminded the reader of the great lines of classical logic based on the third-excluded and a logic meant for a world of energy centred on a third-included, we analyse their relationships. The paradoxes resulting from their application to psychiatry are mentioned. A model reunifying these logics is consequently considered, making it possible to approach a field of logical homogeneous knowledge in psychiatry. A conclusion underlines the practical consequences of it. It concerns the use of logics in order to give a better frame to psychiatric knowledge, the estimation of the data obtained, the theories considered as well as to the orientation of our discipline with the resort to new tools of knowledge.