2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/171545The goal of this paper is to employ a "preclusion principle" originally suggested by Rafael Sorkin in order to come up with a relativistically covariant model of quantum mechanics and gravity. Space-time is viewed as geometry as opposed to dynamics, and "unwanted" histories in that geometry are precluded.I have incorporated third law of thermodynamics into the decoherence argumentsGeneral Relativity and Quantum Cosmologytext