EN
This paper deals with indicators of argumentation in spoken language interaction, i.e. it investigates linguistic and other means used to design an utterance to be recognized by recipients as having an argumentative function. The paper combines elements of the theory of argumentation and conversation analysis, and it is based on data from Czech news interviews with two interviewees. In particular, the study focuses on the linguistic form of argumentation, its sequential position in interaction and its propositional content. The analysis reveals that the sequential position of argumentation (interactional context) is a factor more important for its identification than the linguistic form, but that the most important factor is represented by its propositional content, i.e. argumentation is predominantly content-defined.