This text presents an epistemological option for beginning literacy which departs from traditional options in several respects: (1) objectivity is not assumed as a starting point but as an ending fact (as an aspiration more than a reality); (2) all research communities adopt certain paradigms as their unquestioned 'epistemic framework' which serve to validate methodological and theoretical approaches without discussion; (3) situating oneself at the boundaries of this 'unquestioned scientificity' reveals useful data worth bearing in mind in the specific field discussed here: the early stages of the cognitive approach to the object of 'written language'. This text defends the empirical interest of Jean Piaget's theory to incorporate a theoretical object not thematized by this researcher: written language. It debates the irrelevance of interpretations inspired by Piaget yet based on a purely applicationist vision of the theory. Constructivism is constructed by testing new hypotheses on new objects. That is the persistent message of this text, which provides data to support each claim about development.