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In the corpus articles (in the original as well as in the modularised version), the central problem is formulated in terms of a well-defined goal. The course of action at the microscopic level is sufficiently clear to define such a goal. In the original text of A05 the central problem is described in section 1.Introduction and in the abstract (see the first page of the original article).

In theory, the method used to solve the central problem should not be mentioned when that problem is stated. However, in this domain of experimental research on molecular dynamics, we do name the method in the description of the problem. In this type of research, the methods (scattering) are an integral part of the central problem. The experimental method, in particular, determines the choice of problem and the solution, as well as the community of peers in which the research is embedded. Thereby, it more or less defines the domain of the research. In A05 it is made clear that the article has an experimental component, which is valuable on its own, and a theoretical component in which the experimental results are interpreted. Therefore both aspects are reflected in the Central Problem.

The module Central problem overlaps a lot with the module m6a Findings, where an answer to the central question is formulated. This module also shares information with other modules, announcing the response to the problem at hand, which is elaborated in these other modules: the Central problem is a `summarising module'.

We have included another in this demo version of this module, in which the text is coded typographically, to indicate text supplied manually, rephrased text and text overlapping with other modules. In the printable version of the modules of A05, we have done so for every module. Here, only for a few.

Comments on A05-m2b