OSM - slight generalization of Schwarzshild BH, where you take evolving spherically-symmetric mass distribution instead of point mass - shows that point singularity in the middle can be naked (aka observable), so it's not just QM that causes worms...
reply> The problems start once you consider quantum mechanics, because any such singularity will break unitarity (a fancy way of saying that probabilities must add up to 1), which means your theory as a whole can no longer make predictions.
replyHow is this any different than classical? Isn't it still just an ~impossibility hidden behind an event horizon in either model?
With our current understanding, baryon and lepton number are not conserved as a black hole radiates. I think this is a better demonstration of the incompatibility with classical and quantum mechanics.
replyWe don't actually know if a black hole has an inside. Some theories/hypotheses say spacetime just stops at the event horizon.
replyThis is like saying the Riemann zeta function is only defined for real numbers. You can always extend the singularity mathematically by incorporating new axioms.
replyMy point is, it’s not super meaningful to argue whether a black hole has an inside.
I don't mean the coordinate singularity, I mean there is no more spacetime after that.
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