'Don't then!' he said angrily. 'You believe Simon, if you want to! He's a journalist, after all I'm only a biologist, and your father. walked to the door, and opened it. 'I'm sorry, Christine. I've had a hard day, I'm tired, and I don't want to sit here listening to my daughter telling me I'm a liar. Go home to Simon. I'm going to bed!'