Streszczenie
This article is concerning the effectiveness of the didactic process. Its purpose is to formulate the problem of founding epistemological obstacles in logic and to indicate some methodological aspects of its researching. The content is the following: (1) Introduction, (2) General background of inquiry, (3) Presentation of the concept of epistemological obstacle, (4) The place of epistemological obstacles in Ajdukiewicz’s conception of methodological self-knowledge, (5) The relation between material implication and a conditional sentence in the context of the concept of epistemological obstacles, (6) Some remarks about the method of surveying epistemological obstacles.