Comments on a set of five analyses of the discourse of a problem-based learning group in medicine. Discusses how the five articles take a first step toward resolving a critical issue of learning theory: understanding the boundary between common sense and technical forms of reasoning, action, and discourse; and by what means students grow from…

Comments on a set of five analyses that all examine the same data (the discourse of a problem-based learning group in medicine). Argues that each of the analyses is representative not only of a research tradition, but also of a distinct research language and, as such, can be analyzed on the basis of the expressive potential of that language. (SR)