"Your conclusion doesn't follow from your premises."
No, it does follow - it's the logical inference.
Obama has reported that everything on his COLB is truthful and correct where he has put online at his official website "Fight The Smears". Therefore, his stonewalling for not giving out his COLB paper copy to the news media or anyone else, one can logically conclude he is not telling the truth and the "Factcheck" Obama COLB is indeed a forgery. All other excuses for not doing so are lame at best.
Again, you would have a point if someone since August 2008 requested it and was denied. However, that has not happened.