The Streetwise skill represents the instinctive understanding that comes from many years of living in the less-than-savory parts of the galaxy. While a few manage to learn the signs and develop gut instincts through careful study and association with those who have lived this hard life, most come about this information through the school of hard knocks. If a character expects to use the complex network of the criminal underworld (and survive), he must learn to speak its language and recognize the roles of those involved.