EN
The main purpose of the paper is to reconstruct insights into the borders of science. This task is undertaken within sociology of scientific knowledge. The article presents a synthesis of the concepts provided by three different programmes within sociology of scientific knowledge.: neo-Durkheimian approach of Stephan Fuchs, historical analyses by Steven Shapin of Edinburgh School and empirical studies of Harry M. Collins and Trevor Pinch concerning the modern science. The main conclusion of the article is that problem of demarcation is rather practical and sociological than theoretical and philosophical.