
(e) enunciative level corresponds to heeded activity ; situational level to
automatic activity. Situational level can be considered as the context of
enunciative level. But in case of impass, it can work as a parallel heeded
space (and it allows to construct new rules for moving solid disks, it is
the case in trial 3 of Olivier - we'll see that later)

(f) several levels of abstractions (i.e. of heeded activity accordind to the
different kinds of putting into perspective occuring at linguistic level)
can o