Zhang San went to a store to buy chocolates. The shopkeeper  showed him four boxes and wrote a sentence on each box. The first box: There are lychees in all the boxes. The second box: There are apples in this box. The third box: There is no chocolate in this box. The fourth box: There are no lychees in some boxes. The shopkeeper said to Zhang San: There is only one truth in the four sentences. There is only one truth in four sentences. which box do you see the chocolate in?
The correct answer is that the chocolates are in the fourth box.