This final lesson in biblical apologetics presents a comprehensive refutation of Mormonism as a biblical counterfeit, employing a threefold approach: biblical, internal, and external critique. It argues that Mormonism fails to uphold the preconditions of intelligibility—uniformity of nature, immaterial laws of logic, and moral absolutes—by positing a material, changeable, and pluralistic pantheon that cannot ground these necessary realities. The sermon demonstrates that Mormon doctrine contradicts Scripture on fundamental points, including the nature of God, salvation, and the resurrection, while also exposing internal inconsistencies, such as the fabricated 'Reformed Egyptian' language and the implausible claim of ancient metal-based civilizations in pre-Columbian America. External evidence, including archaeology, DNA testing, and the discredited Book of Abraham, further undermines its historical claims. The lecture concludes by emphasizing that such counterfeits are particularly dangerous because they mimic Christian language and doctrine, thereby confusing the public and hindering evangelism, and calls for Christians to be equipped with sound theology and presuppositional apologetics to defend the faith with both intellectual rigor and biblical fidelity.