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