The author analyzes the main epistemological orientations characterizing the transhumanist movement, by referring to the results of a recent internal survey. He argues that these data imply a sub-optimal communication between the transhumanist movement and the external world, since its utopian reputation is in contrast with the pragmatic approach to science of most transhumanists. Finally, by shifting from a descriptive perspective to a normative one, he proposes "critical scientism" as an acceptable compromise among the different philosophical souls of the movement and, especially, between scientism and postmodernism.