From a reflection on the recent popularity of the term “post-truth”, we discuss some notions of truth that have been consolidated in human history over the last centuries, highlighting two “regimes of truth”: the positivist conception of truth that characterizes the modern period, suggesting the epistemological closure of the medieval era, and the interpretation of truth according to the dialectical materialist view. We believe that the themes and problems addressed here are of paramount importance in thinking about freedom (or the human being, understanding “being” as an active verb, not as an essence) in the context of hyperinformation and disinformation that is revealed in the current digital age.