these information make it possible to apply main path analysis to examine the knowledge structure or trace the knowledge flow of any scientific fields. it's the dark part of our minds and it's inside us all. the division between classes was marked at all levels but that between manual workers and white collar workers was vast. that's fine, and more power to those people. to further prove his worth, the black pirate says he will capture the next ship of prey single-handed, which he does. remains of a large defensive wall was found on the western side of the city. 