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