Deng Xiaoping�s criticism of the �two whatevers� and the Party-led discussion of the criteria of truth made ideological preparations for the successes of the Third Plenary Session of the Eleventh Party Central Committee. Manuscript of Deng Xiaoping�s letter to the Party Central Committee on the question of �guiding the whole Party, the military and all people in the country with accurate and complete Mao Zedong Thought� written on April 10, 1977 (above). An article by a guest commentator was published on May 11, 1978, in the Guangming Daily entitled �Practice Is the Sole Criterion of Testing Truth� (below).