Bob is high. Bob is big. Anne is little. Anne is small. Charlie is kind. Dave is sad. Dave is bad. If someone is not huge then they are sad. If someone is not rough 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 huge then they are poor. If someone is little and small then they are dull. If someone is dull and not wealthy then they are bad. All nice people are smart. 
Dave is not smart.