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