At first glance, psychoanalysis appears as a colorful collection of variations on a fundamentally blurry paradigm. It cannot develop a unified denotative theory but must work with a connotative symbolic system and largely analogous concepts. This is not a deficiency but rather a structural characteristic determined by the subject of psychoanalysis. Schülein engages with the logic of psychoanalytic theories. Instead of providing another scientific-theoretical assessment of psychoanalysis, he explains why it is not a unified theory but a multifaceted paradigm that is interpreted and used differently by various schools.