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