Alan is big. Alan is high. Harry is small. Harry is short. Fiona is wealthy. Bob is dull. Bob is poor. If someone is not strong then they are dull. If someone is not bad then they are quiet. If someone is wealthy then they are nice. If someone is nice and not sad then they are kind. If someone is dull and not strong then they are rough. If someone is small and short then they are sad. If someone is sad and not nice then they are poor. All quiet people are smart. 
Bob is not smart.