Dave is huge. Dave is strong. Alan is small. Alan is little. Erin is clever. Charlie is bad. Charlie is dull. If someone is not high then they are bad. If someone is not poor then they are wealthy. If someone is clever then they are kind. If someone is kind and not rough then they are quiet. If someone is bad and not high then they are sad. All sad people are short. If someone is small and little then they are rough. If someone is rough and not kind then they are dull. If someone is dull then they are young. If someone is wealthy then they are nice. All nice people are smart. All quiet people are old. 
Erin is not old.