answer: #Person2# concocts excuses for being late for school today and yesterday. #Person2# then asks for a leave tomorrow, saying #Person2#'s grandmother's in hospital, but #Person1# points out that what #Person1# says is inconsistent with #Person2#'s previous statements.
documents: #Person1#: You often come to school late as well. Yesterday, for example, you...
  #Person2#: Yes. I'm very sorry about that. You see, my alarm clock didn't work and...
  #Person1#: Your alarm clock? But you told me yesterday that the bus had broken down!
  #Person2#: Oh, did I? I just forgot to say that my clock didn't work, either.
  #Person1#: It's a good story. Now, tell me again why you want tomorrow off.
  #Person2#: Well...er, you see, my grandmother is ill. She is in hospital and... and she is going to have an operation. I want to visit her.
  #Person1#: Oh, I see. So your grandfather is ill as well.
  #Person2#: As well? I... I don't understand.
  #Person1#: Neither do I. When we began this conversation, you said your grandmother was ill. And you didn't say she was going to have an operation! You said she had already had one! And by the way, you also said she was in an old people's home, not in a hospital.