ABSTRACT
Part of the nature of such a brief commentary is to select-from the kaleidoscope of elements of this multi-layered theme that are worth discussing-only a few elements that focus in the end on the central, constitutive elements of both terms and conceptions. Here, it is necessary critically to scrutinize the respective origins of these conceptions, their explanatory potential, argumentative correlations and, finally, their indisputable theoretical deficits.
