“Assume the forger began with a BC issued to a male born the same day and same hospital as Obama.”
Why would a forger need to do that? Couldn’t he just start out with a blank form? Think about that.
That's a valid scenario. However, it begs the question why the selective "edits" cited by those claiming forgery?
Perhaps the forger wanted to make the image look as if it had been touched up. That may be the case but it can't be proven without the paper original.