Dave is strong. Dave is high. Alan is thin. Alan is little. Harry is nice. Gary is poor. Gary is dull. If someone is not big then they are poor. If someone is not bad then they are wealthy. If someone is nice then they are kind. If someone is kind and not sad then they are quiet. If someone is poor and not big then they are rough. All rough people are tiny. If someone is thin and little then they are sad. If someone is sad and not kind then they are dull. If someone is dull then they are young. If someone is wealthy then they are smart. All smart people are clever. All quiet people are experienced. 
Alan is young.