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