Comment (2) on "Quantum Transfiguration of Kruskal Black Holes"

TL;DR

This paper critiques a previous quantum gravity model, demonstrating it violates fundamental covariance principles and is thus unphysical, questioning its validity in describing black hole properties.

Contribution

It provides an explicit calculation showing the model's violation of general covariance, challenging its physical relevance in quantum black hole studies.

Findings

The model violates general covariance.

It is unphysical and cannot determine space-time properties.

Questions the validity of the original model.

Abstract

An explicit calculation shows that the model constructed in arXiv:1806.00648 violates general covariance. It is therefore unphysical and does not determine properties of space-time or black holes.