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