My role as commentator I understand to involve me in a double responsibility: to accept the invitation intrinsic to every epistemic endeavor, first to "thinkalong-with" the author (co-mentari), in order to understand what is said and maintained, and, second, to test it critically (i.e., again, dialogically). I want first, then, to lay out what I take to be the main themes of Prof. van den Berg's presentation, and then to raise or mark out some issues which call for our closer scrutiny and reflection.