Erin is strong. Erin is high. Dave is thin. Dave is small. Fiona is kind. Bob is sad. Bob is poor. If someone is not huge then they are sad. If someone is not bad then they are wealthy. If someone is kind then they are smart. If someone is smart and not rough then they are clever. If someone is sad and not huge then they are dull. All dull people are short. If someone is thin and small then they are rough. If someone is rough and not smart then they are poor. If someone is poor then they are young. If someone is wealthy then they are nice. All nice people are quiet. All clever people are experienced. 
Dave is not young.