I characterize informal logic and argumentation theory as disciplines consisting of a great variety of research ideas, approaches, conceptual frameworks, and methods which allow to inquire into the complicated phenomenon of argumentation. Yet, the argumentative discourse constitutes a key subject of inquiry for disciplines which deal with various forms of language and reasoning. Among those disciplines there are: formal logic, semiotics, methodology of science and informatics. The articles included in this volume support the thesis that various approaches in the study of argumentation, despite of differences in methods of inquiry, try to realize a common research goal: elaborating tools, in particular (1) language and (2) methods, for analyzing and evaluating common-sense reasoning performed in an argumentative discourse. After discussing the content of the present volume I make some remarks on popularizing informal logic and argumentation theory in Poland.