2. The partisan conception of truth, which can be seen in the revolutionary praxis of the class, corroborates this position. Theologians who do not share the theses of the "theology of liberation", the hierarchy, and especially the Roman Magisterium are thus discredited in advance as belonging to the class of the oppressors. Their theology is a theology of class. Arguments and teachings thus do not have to be examined in themselves since they are only reflections of class interests. Thus, the instruction of others is decreed to be, in principle, false. Here is where the global and all-embracing character of the theology of liberation appears. As a result, it must be criticized not just on the basis of this or that affirmation, but on the basis of its classist viewpoint, which it has adopted a priori, and which has come to function in it as a determining principle. Because of this classist presupposition, it becomes very difficult, not to say impossible, to engage in a real dialogue with some "theologians of liberation" in such a way that the other participant is listened to, and his arguments are discussed with objectivity and attention. For these theologians start out with the idea, more or less consciously, that the viewpoint of the oppressed and revolutionary class, which is their own, is the single true point of view. Theological criteria for truth are thus relativized and subordinated to the imperatives of the class struggle. In this perspective, orthodoxy or the right rule of faith, is substituted by the notion of orthopraxy as the criterion of the truth. In this connection it is important not to confuse practical orientation, which is proper to traditional theology in the same way that speculative orientation is, with the recognized and privileged priority given to a certain type of praxis. For them, this praxis is the revolutionary which thus becomes the supreme criterion for theological truth. A healthy theological method no doubt will always take the praxis of the Church into account and will find there one of its foundations, but that is because that praxis comes from the faith and is a lived expression of it. (Sacred Congregation for the Doctrine of the Faith, 1984).