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