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