I don't think Obama really knows who he is. His “memoirs” have been shown to be inaccurate in many respects, and I believe he picked and chose among the many “stories” he has been told over the years by various relatives.
Complaint Filed Against Obama with the Illinois Bar.
For other violations.
http://amerpundit.com/2008/07/24/complaint-filed-against-obama-with-the-illinois-bar/