《实践论》、《矛盾沦》（以卜简称“两论”）是毛泽东在革命战争时期完成的两部哲学论著，准确地把握“两论”的精神实质，对正确理解毛泽东及其思想，特别是作为一般性理论基础的哲学思想无疑是极为关键的。所以，当诺曼·莱文在《辩证法的内部对话》一书中把目光投向毛泽东 “Practice” and “contradiction and reduction” (referred to as “two theories” in short) are two philosophical works that Mao Zedong completed during the revolutionary war. By accurately grasping the essence of “two treatises”, Mao Zedong and his thoughts, Philosophical thinking, especially as a general theory, is undoubtedly crucial. So, when Norman Levine turns his eyes on Mao Zedong in his book Dialectical Internal Dialogue