But believing in the multiverse is logically equivalent to believing in god, therefore it’s religion, not science.I agree that the multiverse is not science, for the reasons she gives, but the same is true about the black hole interior, inside the event horizon.
To see why, let me pull together what I laid out in my previous videos. Scientists say that something exists if it is useful to describe observations. By “useful” I mean it is simpler than just collecting data. You can postulate the existence of things that are not useful to describe observations, such as gods, but this is no longer science.
Universes besides our own are logically equivalent to gods. They are unobservable by assumption, hence they can exist only in a religious sense. You can believe in them if you want to, but they are not part of science. ...
Fourth [common misunderstanding]. But then you are saying that discussing what’s inside a black hole is also not science
That’s equally wrong. Other universes are not science because you cannot observe them. But you can totally observe what’s inside a black hole. You just cannot come back and tell us about it. Besides, no one really thinks that the inside of a black hole will remain inaccessible forever. For these reasons, the situation is entirely different for black holes. If it was correct that the inside of black holes cannot be observed, this would indeed mean that postulating its existence is not scientific.
A commenter responds:
That seems like a very weak argument; the equivalent in religion to claiming God is observable because, by their postulates, you will observe Him when you die, and unexplainable near-death experiences prove the plausibility of that.I agree with that also. Many religious believers say that we can observe God, heaven, angels, etc. after we die, and we just cannot come back to tell anyone.
That argument is similar to the argument that we can observe a black hole interior by falling into it.
I have no idea why Bee says that everyone believes that the black hole inside will be accessible. There is a misconception that LIGO observes black hole interiors when it detected black hole collisions. But that is not true. Its observations are explained entirely from outside the event horizons.
There is also a crazy belief that black holes will leak info as they evaporate Hawking radiation over the next trillion years. It is similar to the theory that if you send a rocket into the Sun with some paper encyclopedias, all that info will be eventually radiated back out to the solar system. Nobody thinks that is observable, so that is just another religion.
Also, the Hawking radiation takes place entirely in the vicinity of the event horizon, and does not depend on the interior.
Just to be clear, one can observe the mass, charge, angular momentum, and maybe a couple of other external values, but these are all observed based on what is outside the event horizon. If we could predict the interior, we would say that there would be very high energies near the center, and we do not have good physical theories for such energies.