Remember Plato and the process of dialogue. Even a slave -not considered a Greek citizen- could take part in such a questioning "unveiling" the chances of solution.
Processes of creativity require a certain degree of articulation, structuring the chances of a solution, and, especially, discarding bias, which could be a waste of time, therefore, irrelevant to solution-searching.
Looking at the image you include (without reading the whole text -for which I present my apologies) it comes to mind that some of those operation could be combinations of other typical, or archetypal -if we may say so. Accordingly, two processes emerge: first, the isolation of those typical operations and, second, the structures that enable later articulations and combinations. It is then, when you observe a series of transformations that the invariants may lead to the "sketching" of structural procedures.