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