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