We have made a search of critical revision about the literature in epistemology. We started from the "toxic" passions hypothesis, that is, from the assumption according to which there is a functional analogy between passions and toxicomanias: the function of the excess of narcissism, similar, but not identical, in both of them. The objective was to introduce the theoretical basis of the qualitative search method of this hypothesis, starting from the analogical reasoning to psychoanalytical semiology. More exactly, we intended to introduce the discussion about the theoretical foundations of these methods, which we consider analogous, with a double purpose: 1st- to formulate the "toxic" passions hypothesis according to these methods; and 2nd- to make a theoretical plan of study in psychoanalysis, result of discussions among other interdisciplinary approaches. Such a plan, elaborated according to this formulation, could be executed later through the application of these methods to the search of this hypothesis.
Epistemology; qualitative search method; analogical reasoning; psychoanalytical semiology; toxic passions