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