"I...don't know." He shook his head. "There is much we still don't know about Nobodies. Whether the new heart is a recreation of the original or something entirely different, and your lack of memories of your original self complicates matters. I am little different from my Somebody, but my new heart developed with the guidance of my knowledge of who I had been as Even. There is also the question of what becomes of a Nobody who grows an entire new heart, if that has the same effect as recompletion or results in the paradoxical half-existence of a being with the properties of both a human and a Nobody."