Harry is high. Harry is huge. Bob is small. Bob is thin. Dave is kind. Alan is rough. Alan is poor. If someone is not big then they are rough. If someone is not dull then they are wealthy. If someone is kind then they are clever. If someone is clever and not sad then they are quiet. If someone is rough and not big then they are bad. All bad people are tiny. If someone is small and thin then they are sad. If someone is sad and not clever then they are poor. If someone is poor then they are young. If someone is wealthy then they are nice. All nice people are smart. All quiet people are old. 
Alan is smart.