Alan is high. Alan is strong. Charlie is thin. Charlie is small. Bob is nice. Dave is poor. Dave is sad. If someone is not big then they are poor. If someone is not dull then they are wealthy. If someone is nice then they are smart. If someone is smart and not rough then they are clever. If someone is poor and not big then they are bad. All bad people are short. If someone is thin and small then they are rough. If someone is rough and not smart then they are sad. If someone is sad then they are young. If someone is wealthy then they are quiet. All quiet people are kind. All clever people are experienced. 
Alan is short.