The narrator asks the teacher if any of the students smell the "pure water" in the classroom. The teacher tells him that it is a "suggestion effect" , meaning that everyone thinks the teacher has said something, and everyone searches for the source of the water's odor. He tells the teacher to take away his judgement and let the students search their own way. The narrator is surprised to find that the class is not a physical science class, but a psychology class. He thinks that the students have already gotten a good idea of what the teacher is talking about. In the case of the waiter, he asks the first person if he wants dry fried beef. The man looks hesitant, and the narrator thinks he will change since he sees all the other diners eating beef noodles. He walks frivolously, and looks around. This kind of person isn't determined . The other students chose another one so he hesitated