In accordance with this, the truth means something formal, and coincides with the logical correction. The truth concept can be associated with the fenomenalismo, treated for Eduard von Hartmann, where independent objects of the thought, completely incognoscveis exist, and the truth of the knowledge alone can consist of the agreement of the object with its proper laws. This point of view is defended by Kant, or instituting a strict idealismo; or recognizing the existence of real objects. If time and space existed formal and only in the conscience, must be assumed that the objects possess real determination that apply those forms of the intuition, as well as for the forms of the thought. But the way to see the things if bases on who the knowledge is a reproduction or a production of the object, therefore the knowledge is relative to the object, and this does not need to consist of a reproduction, is enough to assume that relation between the thought and the object. Of this form it is arrived a conclusion on what the natural conscience possesss of the human knowledge, that means a purificao critical of the conception of that the human knowledge nothing more is of what a relation between a citizen and an object.

idealismo in turn, tries to remove the dualism of the citizen and object, and to institute a epistemolgico monismo, therefore it believes that of this form all the problems of the knowledge are eliminated. 3.2O criterion of the truth the truth concept is on directly to the criterion of the truth, what better it is explained in the logical idealismo, where the truth means agreement of the thought obtains exactly. The contradiction absence is a valid criterion of truth only to the knowledge of the field of formal sciences. In this field, the thought only deals with thought objects, and a judgment true if is constituted as the laws of the thought.