What if it's some other class of object that we have yet to identify? Why black hole if not neutron star? There's a whole science to this with a fun name: htt

What if it's some other class of object that we have yet to identify? Why black hole if not neutron star? There's a whole science to this with a fun name: https://en.wikipedia.org/wiki/Degenerate_matter https://en.wikipedia.org/wiki/Degenerate_matter Quantum theory predicts and limits the sorts of things you can get once you really put the squeeze on and these predictions align well with observations.