Is it possible to draw a border line between ontology and epistemology? A positive answer to this question looks attractive, mainly because it reflects convictions deeply entrenched in our common sense view of the world. However, anyone wishing to clarify the distinction between the ontological and the epistemological dimensions meets problems. This is due to the fact that the separation between factual and conceptual is not clean, but rather fuzzy. It is certainly correct to state that science means to offer correct information about the world, but the extent to which it succeeds in accomplishing this task is always questionable. We cannot claim that the picture provided by today science - our current scientific image of the world - is abs...