Alan is huge. Alan is strong. Erin is little. Erin is thin. Anne is kind. Dave is sad. Dave is bad. If someone is not high then they are sad. If someone is not poor then they are nice. If someone is kind then they are wealthy. If someone is wealthy and not dull then they are quiet. If someone is sad and not high then they are rough. If someone is little and thin then they are dull. If someone is dull and not wealthy then they are bad. All nice people are smart. 
Dave is smart.