He does so by writing about three high school philosophy teachers, the first of whom is an idealist, the second a skeptic, the third a realist with enough of a phenomenological sensibility to be convincing. The inquiry is into what is that white, rectangular object lying on the desk (i.e., a notebook):
"We all have the impression that this is an object outside ourselves. This evidence is primary, original. But if I do not know it? It is as if it did not exist. You see, therefore, that knowledge is the encounter between human energy and a presence. It is an event where the energy of human knowledge is assimilated to the object. How do you produce such an assimilation? This is a fascinating question that we can only partially answer. We are certain, however, that knowledge is composed of two factors" (pg. 8).