2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35389Simon argued that the semi-classical theory of gravity, unless with some of its solutions excluded, is unacceptable for reasons of both self-consistency and experiment, and that it has to be replaced by a constrained semi-classical theory. We examined whether the evidence is conclusive.12 pagesGeneral Relativity and Quantum Cosmologytext