While there have been ample apologetic responses to objections of the doctrine of the Trinity, few in recent years have sought to undergird their the apologetic approach with a robust understanding of the Trinity as communicated in Scripture. To help bring insight into this area of apologetics, two apologists who lived during the twentieth century may be instructive: E. J. Carnell (1919–1967) and Francis Schaeffer (1912–1984)—both of whom studied under Cornelius Van Til for a time. E. J. Carnell subtitled his introductory work on apologetics as a “Philosophic Defense of the Trinitarian-Theistic Faith.” Likewise, Francis Schaeffer often noted the importance of the Trinity in solving important epistemological problems in his apologetic approach. In this paper I will compare these two apologists and their approaches as it relates to the inclusion of the doctrine of the Trinity to demonstrate that their apologetic approaches are an important posture for evangelicals moving forward.