John Frame's apologetic

In the past, Van Tilian apologists made sketchy, grandiose claims about the inadequacy of non-Christian alternatives. Oftentimes, these programmatic claims never got beyond the level of slogans. In addition, progress was often stalled by insular, repetitious debates over methodology. However, there has been some important work to redeem the vouchers. 

Much of John Frame's work has an apologetic thrust. In some cases that's more explicit and sustained. For instance:

• We Are All Philosophers: A Christian Introduction to Seven Fundamental Questions

• Nature's Case for God: A Brief Biblical Argument

• Christianity Considered: A Guide for Skeptics and Seekers

• Apologetics: A Justification of Christian Belief

His monograph on The Doctrine of the Word of God defends biblical revelation. His monograph on The Doctrine of the Christian Life contains a section sifting non-Christian ethics, while A History of Western Philosophy and Theology contains a wide-ranging survey comparing and contrasting Christianity to non-Christian thought. 

While much work remains to be done, in the hands of its best exponents, presuppositionalism has moved beyond slogans and methodological disputes to substantive analysis.