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