Which is what makes simulating things within QM compute-able in finite time, too, as I recall. I wonder if unitarity could be tested with analogs to black hole

Which is what makes simulating things within QM compute-able in finite time, too, as I recall. I wonder if unitarity could be tested with analogs to black holes like the sonic analog. Otherwise this seems testable in a weak sense. [edit] I just want to point out that, to my intuitive idea of how a black hole would work in string theory - it seems all the information would not be lost. It would be compressed to the event horizon along with everything else.