I believe I've already stated that I have no problem with the premise that it's impossible to be aware that you are unaware. There's nothing fundamentally wrong with his reasoning there. It's the fact that, by itself, that observation proves nothing.
Again, the only way that observation will mean anything is a situation where that observation could be violated. Assume conventional beliefs about consciousness: when you are dead you lose your consciousness. By doing so, it is not possible to be conscious of your dead state, as your conscious is no longer in existence. The observation is not violated. Reality makes sense.
However, he makes the argument that consciousness is not lost upon death, and that it's impossible to die (a.k.a. be unconscious) and maintain consciousness, therefore you must be reborn in a new body and mind but consciousness must be maintained. OK, fair enough, but first you must prove that consciousness is not lost upon death. And that's where all logic is thrown out the window and leaps of faith occur. Read my previous post on how his logic used to compare energy and consciousness is flawed at this point.