Is such a flaw conceivable in GR?

[Markus Hanke]

16 hours ago, studiot said:

And there is a fundamental issue between GR and particle physics that no one has thus far brought up.

Well, one of these issues would be that the energy-momentum tensor, being the source term in the Einstein equations, cannot be promoted (to the best of my knowledge) to a Hermitian operator in the QM sense.