Abstract
[The statement] A ^ Ā is doubtlessly a logical contradiction in terms of formal logic. However, according to dialectics this is a state which the contradiction in the essence of a thing experiences in the process of development — a state of qualitative change of being "at once this and that." A contradiction under such circumstances is an important object of dialectical studies. And such a state of affairs actually exists in real life; a thing tends to experience such a state when it changes into its opposite. The contradictory aspects experiencing such a state both conform to reality. Therefore A ^ Ā is a logical contradiction and a dialectical contradiction as well. The two types of contradictions are actually the two manifestations of the same contradiction in different contexts. Or, in other words, they are the different points of view and approaches of two kinds of logic toward the same contradiction. Obviously, in distinguishing problems we must first make clear the two different kinds of logic, or, the two different methods in approaching contradictions, rather than distinguishing between two types of contradictions. That is to say, what we must distinguish first is logic and not contradiction. In different categories of logic, contradiction takes on different character