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