In the problematic line for the investigation, the role of the theory, its positive explanatory or formal prescriptive status, its complex relationship with the subject's experience, the emergence of other theoretical bodies from the confrontation, the relative truth criteria are fundamental. of the theorems that usually translate into certainty that hinder critical reflection and analysis, work criteria that can be supported by critical use of theory or formal or educational use, the logic of theoretical discourses and the changing nature of reality .