The scientistic allegation that psychoanalysis proceeds 'unscientifically' can be made only if the formulation of hypotheses is considered a prescientific stage and 'scientific' is equated with 'objectifiable'. In the process of acquiring knowledge in various disciplines, a common pattern of human experience can be demonstrated. Physical research is characterized by the subject-object relation, whereas psychological research is typified by the communicative subject-subject relation. Wesiack believes that, following Heisenberg and Planck, it is not the ontological truth content of hypotheses which constitutes the criterion of their being 'scientific', but their usefulness. He characterizes psychoanalysis as a science of man, an integrating component of anthropology, which does not fit into the traditional scheme of the arts and sciences.