As we have pointed out, its starting point is the radical critique of all realism, of any conception that is based on firm and constituted entities of the knowledge by means of such or such procedures could give account, that is to say arrive at the truth. The critique of the underlying ontological conception leads to the critique of the notion of knowledge and truth. "The Critique of Metaphysics in Nietzsche" by Juan Luis Vermal, p.150, 1987..
The language that handles the metaphysics approached by great philosophical authors considers an absolute line of the difference of the world in function of called conceptual thinking, a fundamental reason of a result of non-empirical perspective, the form that is approached the object represents it the living flesh of the experience of the human being, are conditions dame form in matter of constitutive of the world maintaining an idealism of knowledge with limits, for they are something fictitious to nuestrs action of judgment and ontological perceptions.
The arguments leads us to relative context of knowledge and truth are not absolute, each being manages its reality and its truth according to its knowledge, since knowledge is a fact, as well as a judgment of ideas plan8de an abstraction of reality, the mechanism of seeing things shows a path of conception linked entity and human understanding, all symbolizes as a self-criticism of our own being, where knowledge can not constitute but an indirect manifestation of the value of the cognitive faculties, also in just thinking or the action of thinking makes unique to be human.