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