Bob is furry. Bob is nice. Bob is red. Bob is rough. Bob is round. Bob is smart. Bob is young. Fiona is nice. Fiona is rough. Harry is red. If someone is round and smart then they are furry. All rough people are smart. If someone is nice and young then they are round. If Fiona is smart then Fiona is rough. If Fiona is furry and Fiona is rough then Fiona is young. All nice people are furry.
Harry is rough.