Sedeplenist may also be used to signify the minds of Catholics who believe the Novus Ordo popes are fully fledged popes and are truly in possession of the full authority promised by Christ to Saint Peter and his successors, yet have substantially erred in the teaching of the universal ordinary magisterium on matters of faith and morals. In their perspective they believe this kind of error is possible and has occurred, so they may lawfully recognize and resist the fully seated papal authority on the most essential matters which constitute a religion: doctrine, morals, liturgy, sacramental system, code of law, and nature of government.