Alan is huge. Alan is strong. Dave is small. Dave is short. Harry is nice. Erin is poor. Erin is sad. If someone is not big then they are poor. If someone is not rough then they are quiet. If someone is nice then they are kind. If someone is kind and not dull then they are wealthy. If someone is poor and not big then they are bad. If someone is small and short then they are dull. If someone is dull and not kind then they are sad. All quiet people are smart. 
Dave is not sad.