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