Undoubtedly, we must criticize wrong ideas of every description. It certainly would not be right to refrain from criticism, look on while wrong ideas… - Mao Zedong

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Undoubtedly, we must criticize wrong ideas of every description. It certainly would not be right to refrain from criticism, look on while wrong ideas spread unchecked and allow them to dominate the field. Mistakes must be criticized and poisonous weeds fought wherever they crop up. However, such criticism should not be dogmatic, and the metaphysical method should not be used, but instead the effort should be made to apply the dialectical method. What is needed is scientific analysis and convincing argument. Dogmatic criticism settles nothing. We are against poisonous weeds of whatever kind, but we must carefully distinguish between what is really a poisonous weed and what is really a fragrant flower. Together with the masses of the people, we must learn to differentiate carefully between the two and use correct methods to fight the poisonous weeds.