Bob is furry. Bob is not green. Charlie is furry. Charlie is not green. Charlie is rough. Charlie is not white. Dave is cold. Dave is not green. Dave is quiet. Dave is white. Harry is not cold. Harry is furry. Harry is green. Harry is smart. Harry is white. All white, rough people are green. All quiet, rough people are cold. Rough people are furry. If someone is white and not quiet then they are green. If Dave is not cold then Dave is white. If Bob is not smart and Bob is not cold then Bob is furry. If Harry is rough and Harry is not green then Harry is white. If someone is quiet and not furry then they are white.
Harry is quiet.