ABSTRACT
In my opinion, if we are to define a field or perspective of knowledge it is essential to focus on those aspects of reality that are meaningful for the subject. This formulation is not the expression of a naive realism: clearly it is the subjects who select particular aspects of reality and attribute meaning to them. These activities of abstraction and the attribution of meaning take place within a framework of interaction with real data which, of course, have a role to play in cognitive processes.
