Black Hole Information Paradox: What Happens to Missing Black Hole Matter? (String Theory)

The current thinking on the black hole information paradox is that there is a quantum system underlying the black hole, and that this quantum system never loses information, though the system can mix up the finer points in a complicated way. To reconcile this picture with Hawking’s calculations
(see topic 14), the concept of complementarity is sometimes invoked. This idea, proposed by Leonard Susskind, says that someone outside the black hole may observe different results than someone falling into the black hole, but that no contradictions will arise.
This approach hasn’t settled the problem for everyone, including physicists who believe that relativity should hold more sway than quantum mechanics. Whatever the solution, a theory of everything would have to present a definitive set of rules that could be applied to figure out what’s happening to matter (and information) that falls into a black hole.