You are visiting a strange country in which there are just two kinds of peopleâtruthtellers and liars. Truthtellers always tell the truth and liars always lie. You hail the first two people you meet and say, "Are you truthtellers or liars?" The first person mumbles something you canât hear. The second says, "He says he is a truthteller. He is a truthteller and so am I." Can you trust the directions that these two may give you?