Hi from Santa Barbara. I’m at the KITP firewall workshop ...How is this even considered science? No experimental evidence and little math -- just cartoons.
It’s true that most of the talks have surprisingly little math in them (and, of course, zero input from any recent experiment): it’s mainly just conceptual arguments illustrated by simple cartoons. ...
As I understand it, the issue is actually pretty simple. Do you agree that
(1) the Hawking evaporation process should be unitary, and
(2) the laws of physics should describe the experiences of an infalling observer, not just those of an observer who stays outside the horizon?
If so, then you seem forced to accept ...
I don't see why the laws of physics should tell us about the inside of a black hole. There is no experiment that can tell us anything about what is inside the Schwarzschild radius.
I have argued before (such as here, here, here, and here) that unitarity is a mathematical convenience with no proven physical significance. It is violated by wave function collapse, altho there is no agreement on whether the collapse is real or is an illusion.
Update: A new thesis on wave function collapse has just been posted. It starts with this J.S. Bell quote:
The continuing dispute about quantum measurement theory... is between people who view with di fferent degrees of concern or complacency the following fact: so long as the wave packet reduction is an essential component, and so long as we do not know exactly when and how it takes over from the Schrodinger equation, we do not have an exact and unambiguous formulation of our most fundamental physical theory.As long as there is this disagreement, there is no agreement that any process is unitary.