2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/195797The relevance of the Planck scale to a theory of quantum gravity has become a worryingly little examined assumption that goes unchallenged in the majority of research in this area. However, in all scientific honesty, the significance of Planck's natural units in a future physical theory of spacetime is only a plausible, yet by no means certain, assumption. The purpose of this article is to clearly separate fact from belief in this connection.14 pages, LatexGeneral Relativity and Quantum Cosmologytext