Daniel Coumbe of the Niels Bohr Institute, in his April 21, 2021 Physical Review D article entitled "Is asymptotically Weyl-invariant gravity viable?", presents 6 criteria for a viable new theory of gravity. Do you agree or disagree? Are Coumbe's criteria meaningful? What would your own criteria be?

According to Coumbe, a viable new theory of gravity must be:

1. equivalent to general relativity in the low curvature limit

2. renormalizable in the high curvature limit

3. unitary

4. stable

5. free of curvature singularities

6. consistent with observation.

Coumbe is clearly assuming gravity must be quantized. Many physicists would disagree.

Article Is asymptotically Weyl-invariant gravity viable?

Also availabe at:

https://arxiv.org/pdf/2101.06094

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