唯物辩证法认为,矛盾是事物自身包含的既对立又统一的关系,矛盾就是对立统一。所谓“对立”,是指矛盾双方互相排斥,互相斗争(即斗争性)。所谓“统一”,是指如下两种情形:一是指矛盾双方在一定条件下相互依存、互为前提,共处于一个统一体中;二是指矛盾双方依据一定的条件相互转? Materialist dialectics holds that contradiction is the relationship between things that are both inherently and uniformly contained, and that contradictions are the unity of opposites. The so-called “opposition” means that the two parties to the conflict are mutually exclusive and fight each other (that is, struggle). The so-called “unification” refers to the following two situations: First, it means that the two sides of the contradictions are interdependent and mutually premised under certain conditions, and they are all in a unified body; the other is that the two parties to the contradiction turn to each other according to certain conditions.