Abstract
In terms of ontology, the so-called dialectical contradiction is precisely the unity of opposites of the objective world itself, in other words, the objective dialectics. In terms of subjective thinking, dialectical contradiction is the reflection of the objective world, the unity of opposites inherent in thinking and understanding, in other words, the subjective dialectics. Said Engels: "The so-called objective dialectics dominates the entire nature; the so-called subjective dialectics, that is, dialectical thinking, is nothing but the reflection of contradictory motions prevalent everywhere in nature …" . Therefore there is a fundamental difference between dialectical contradiction and logical contradiction