Harry is not furry. Harry is not green. Harry is rough. Harry is not round. Harry is smart. Harry is not white. Harry is young. All white, young things are furry. If something is round and smart then it is not young. If Harry is furry and Harry is rough then Harry is young. If something is white and not rough then it is smart. If something is green then it is young. If Harry is furry and Harry is green then Harry is round.
Harry is rough.