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