In Qin dynasty, there was a powerful and evil counselor named Zhao Gao. Zhao Gao wanted to rebel, but he didn't know how many people in the court would stand by his side. So he worked out a way to test the people. He presented a deer as a tribute to the emperor in front of the court, and said that it was a swift horse. The emperor not accepting his statement said, "This is obviously a deer." Then, Zhao Gao took this opportunity to ask the court, "Is this a deer or a horse?" In the court,...