In a passage through Moritz Schlick’s œuvre, the intention of the present essay is to show the way in which the distinction between knowledge and lived experience, between theoretical and practical decisions—a distinction decisive for the Vienna Circle in general—rests on a definite fundament in Schlick: he develops already in his early work Wisdom and especially in his treatise Problems of Ethics a concept of the social character of man, a character that proves to be—and the principal task of the (...) present essay is to show this—the basis on which the strict separation between knowledge and lived experience appears as a necessary requirement independent of every critique of the conditions of knowledge. Here a key role is granted to Schlick’s concept of play, in terms of which the common determinacy of knowledge and lived experience is thought, a determinacy in which alone they are able to correspond to their social reality. (shrink)