在纪念关于实践是检验真理的唯一标准问题讨论20周年之际，实事求是地总结这一次意义深远的大讨论具有非常特殊的现实意义。恩格斯曾指出：“历史从哪里开始，思想的进程也应当从哪里开始，而思想的进一步发展不过是历史在抽象的、理论一贯的形式上的反映；这种反映是经过修正 In commemorating the twentieth anniversary of the sole discussion on the sole criterion of practice as the test of truth, it is of special and immediate significance to sum up this far-reaching and profound discussion in a realistic manner. Engels once pointed out: "Where does history begin, where the process of thought should begin, and the further development of thought is nothing more than the historical reflection of abstract and consistent forms of history; this reflection has been corrected