Bob is big. Bob is huge. Alan is little. Alan is small. Dave is wealthy. Erin is bad. Erin is poor. If someone is not strong then they are bad. If someone is not sad then they are kind. If someone is wealthy then they are nice. If someone is nice and not rough then they are quiet. If someone is bad and not strong then they are dull. All dull people are thin. If someone is little and small then they are rough. If someone is rough and not nice then they are poor. If someone is poor then they are young. If someone is kind then they are clever. All clever people are smart. All quiet people are experienced. 
Erin is smart.