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