二十年前的这个时候,党领导人民粉碎“四人帮”之后,进一步开展了批判和肃清“四人帮”的流毒,总结“文化大革命”的经验教训。但却遇到“两个凡是”思潮,即维护文化大革命的“左”的错误路线的思潮的阻扰,难以深入进行。思想理论界一部份坚持马克思主义思想的学者,提出并开展了“实践是检验真理唯一标准”的讨论。这场具有深远历史意义的讨论,一开始就受到坚持“两个凡是” At this time twenty years ago, after the party leadership people crushed the “gang of four,” they further carried out the criticism and the liquidation of the “gang of four” and summed up the experiences and lessons of the “Cultural Revolution.” However, it has been difficult to carry out in-depth discussions of the trend of thought that “the two of us are”, that is, the thought line of safeguarding the “leftist” line of the Cultural Revolution. Some scholars in the ideological and theoretical circles who uphold Marxist thought proposed and carried out a discussion that “practice is the sole criterion for testing truth.” This far-reaching historical discussion, from the very beginning, was insisted “two commonplace”