Warning: Bad Language.
How can we expect the The Dark Knight to "rise" if he can't even grasp such a simple concept?
The answer is that we don't. This, above all else might be why Batman ended up taking the blame for Two-Face's crimes. It was a better fate than letting the entire world know what a dumbass he really was.
This is not surprising considering that even Batman doesn't know that he's really Bruce Wayne.