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