" Zhao Gao was contemplating treason but was afraid the other officials would not heed his commands, so he decided to test them first. He brought a deer and presented it to the Second Emperor but called it a horse. The Second Emperor laughed and said, "Is the chancellor perhaps mistaken, calling a deer a horse?"

Then the emperor questioned those around him. Some remained silent, while some, hoping to ingratiate with Zhao Gao, said it was a horse, and others said it was a deer. Zhao Gao secretly arranged for all those who said it was a deer to be brought before the law. Thereafter the officials were all terrified of Zhao Gao. "

― Sima Qian , Records of the Grand Historian: Qin Dynasty