In my contribution I aim at comparing the different argumentative strategies of phenomenology and psychoanalysis, both taken specifically as theories of subjectivity. Despite their different histories, theoretical frameworks, and practical aims, the two traditions offer, in my opinion, the possibility of studying subjectivity not as a static foundative ego nor as an abstract set of mental states, but as a processuality of individuation, as the process of becoming a self, as an interwoven flow of motivations that do not follow one another randomly, but are submitted to a peculiar internal logic. With the epistemic and epistemological instruments of genetic phenomenology and psychoanalysis I identify this as a non-representational logic, a logic of desire and motivation that requires new, differentiated forms of evidence. Both the adequate understanding of human experience and the justification of different types of experiential evidence require a paradigm shift in the human sciences.