The strict limits imposed on this paper make it necessary to confine it to a schematic resume of problems the importance of which demands an extended and exhaustive treatment. For this reason the author feels constrained to treat only a few of the many problems which, when duly considered, are capable of producing a radical modification in the field of epistemology. Likewise, the author cannot arrive at any settled conclusion, since he is hindered by the extent and close reasoning of (...) Heidegger's work, his subtlety, and the fact that his work is not yet completed. The intellectual revolt in which Heidegger's existentialism consists is based in part on a critical restatement of the problem of being and, further, in a series of concepts, namely, the world, utility and presence, the duality of subject and object, ontology and knowledge, all subordinated to the most important and ultimately superior concept of existence. These concepts and their revision, as a point of departure for Heidegger's existentialism, owe their origin to phenomenology and philosophy of life (above all, Dilthey's). From the revision of the above-mentioned concepts, by distinguishing in each one of them what, by reason of its inaccuracy, is a source of confusion, there are derived possible changes which, in the view of the author of this paper, may be described as: (1) the subject-object correlation, (2) knowledge, (3) the intellectual function as ground of the possibility of knowledge, and (4) the categories. With regard to the first problem--that of the subject-object correlation--it must be said that if it does not really disappear in Heidegger, he has profoundly modified it, since he does not accept the view held by his predecessors in all the history of philosophy that in the subject-object correlation there are given: (a) the subject, (b) the object, (c) the act of knowledge, and (d) the categories as entities equipped with absolute independence and unique peculiarities. The old view cannot be true, because, says Heidegger, at the start human existence appears so interested in its own being that there is no extra-subjective being prior to the being of human existence. The extra-human, that which is not purely existential (as human existence alone is), is given as useful, whatever it be. Human existence is comprehension of its own being. This comprehension, at the same time that it establishes the being of human existence, also renders possible whatever else is given, in the manifestation of a what rather than in that of a how. Or it may be that the theoretical yields to a prior qualification and by the same basic principle in the constitution of the world, and this qualification is the pragmatic character of the total reality. In harmony with this, it follows, according to Heidegger, that it is impossible to locate subject and object on the same plane; this is already equivalent to locating existence (who) and reality (what) on the same plane. It means nothing to speak of a determination of the subject by the object or vice versa, since there is no way of proving that a predetermination of the subjective and the objective precedes the determination so as to render possible the determination and with it the correlation. And if this is impossible, the intellectual function which makes knowledge possible is annulled, and every pre-essence of forms or manifestations of theoretic nature, such as the nous, the Platonic ideas, the Aristotelian active intellect or the Kantian a priori--all are dissolved in the presence of Heidegger's thesis of the uniqueness of (human) existence and the world, inasmuch as it affirms that knowledge is merely a modality of being-in-the-world. Finally, with regard to the categories, the chief negation of Heidegger proceeds from the fact that, up to this time, the categories are considered sometimes as situated in the object, sometimes in the subject, and zppear to be valid for all being. Heidegger is opposed to this; he postulates categories for the existentials different from those which prevail for other entities. He does not accept a categorial structure which is closed within itself and incapable of alteration. Finally, for him, the categries are interpretative in contrast to the traditional view that they are entitative and to Kant's view that they are constitutive. (shrink)