Abstract
This article focuses on the educator's mission, which must be to meet students within the realm of the natural logic of everyday language and guide them toward mathematical logic, the underlying set theory that forms the foundation of 20th-century mathematics. We examine the identity A=A, critiqued Hegelian theory as a fundamental law of thought and adopted in the psychoanalysis field as the gateway into mathematical discourse. We discuss Russell's paradox and its resolution by distinguishing between class and set. Special attention is given to the introduction of the empty set, unordered pairs, and singleton sets in the ZFC set theory. Following Lacanian guidelines, we illustrate how the mathematical discourse on arithmetic is not only subject to the contradiction of self-reference but is also inevitably influenced by the unconscious of the subject attempting to articulate a discourse without subject. In Lacanian theory, this influence is located in the Platonic conception and shows how it is present in the concept of One. We provide an introduction to Intuitionistic Logic, which is more attuned to natural language. We conclude by cautioning mathematics educators about the presence of the unconscious in the institutional relationship between teacher and student and justify our invitation for them to join us in embracing the motto: Teach by listening, learn by speaking .
Mathematics teacher and natural logic; Natural language; Mathematical logic; Hegel and Lacan; Intuitionistic logic