1. Introduction
It is really hard to classify knowledge in the field of
Human Sciences, because of the richness of perspectives
and orientations, the variety of schools of
thought, doctrines, individual standpoints that every
discipline or field of research in Human Sciences can
present.
Considering now the system of sciences as a
whole, it is worth mentioning the point of view of
Jean Piaget, one of the most significant scholars of
Epistemology in the 20''' century, as well as of Psychology,
and deeply concerned with problems of sciences
organization.