Description:
This work shows that in mathematics classroom appear many argumentations that are not correct for aristotelic logic. We observe that some students have used not valid argumentations. We reporte some of their declarations that show a position in front of classic forms of argumentation and that denote the nonacceptance of the aristotelian forms. This report is part of a research whichaim is to understand the sociocultural character of the mathematicalargumentations, trying to show them as result of actions of a community into a sociocultural stage. Our culture, with aristotelic sustenance, has constructed forms of argumentation based on this logic. Nevertheless, in the classroom there are revealed some situations that demonstrate the character of social construction of mathematical argumentations and that we consider it has to betaken in account in the mathematical school discourse.