> Anyone who has taken a graduate level class in General Relativity would have been able to tell you the same.

You say that and yet this thread is full of people arguing about it, and there's an entire Wikipedia article on this: https://en.wikipedia.org/wiki/Gravitational_singularity.

In fact, that article says:

> No complete and precise definition of singularities exist in the theory of general relativity,

So which is it? It can't both be trivial to any grad student but also an open question. And things like naked singularities aren't proven to not exist either.

Also, general relativity is a classical, geometric-only theory. It seems obvious that better understanding what a black hole's singularity is would require quantum mechanics because the singularity is effectively what's "left over" of the physical material once you go beyond a neutron star.