[dumpsterdiver]

> What distinguishes a black hole from other objects is not its mass, but its spacetime geometry

Fair enough. Primordial black holes are a good theoretical example of environmental density conditions being perhaps a larger factor than mass even. My point was that it was still matter. It doesn’t matter if you squish it all down - it’s still matter.

> A black hole is not made of normal matter; it's vacuum.

When we talk about black holes, some might be referring to the event horizon, and others the singularity which makes the event horizon possible. But I’m not sure what you mean when you say that a black hole is made of vacuum. Are you saying that the singularity of a black hole is a vacuum? And not matter?