知道答案的都是聪明人.doc

A visitor visits an island where two tribes live. One tribe always tells the truth and the other always lies. The truth
A visitor visits an island where two tribes live. One tribe always tells the truth and the other always lies. The truth tellers live on the western side of the island, and those who lie live on the eastern side. The visitor wants to determine whether the native beside him is a truth teller or not by asking only one question. He asks the native, “Go and ask the native in the distance which side of the island he lives on。” When the messenger returns， he says, ”He said he lives on the western side of the island."
Is the messenger a truth teller or not？ How can the visitor be sure?
Q：1. According to the messenger's answer， the visitor can conclude that_______
A. The messenger lives on the western side of the island because he tells the truth.
B。 the messenger lives on the eastern side of the island because his answer may be a lie.
C. it's hard to determine whether the messenger is a truth teller