 Graham’s textual arguments were indirectly supported by archeological discoveries of different Laozi texts. The discoveries in the early 1970s and 1990s together implied a relatively late date for the emergence of the Laozi text—probably some years after Zhuangzi had lived and perhaps overlapping the composition of a series of dialogues between Laozi and Confucius in the “Outer Chapters” section. Graham speculated that Zhuangzi’s students, who were writing the cycle of Laozi-Confucius dialogues, may have rhetorically chosen to use the legendary Lao Dan (mythical teacher of Confucius) to give him authority to lecture and ridicule the revered master. 