Some critiques of Reformed Presuppositionalism

Most Reformed apologists are presuppositionalists (for a book-length discussion of this methodology, see Greg Bahnsen's Van Til's Apologetic: Reading and Analysis [Presbyterian & Reformed, 1998]).

For some accessible online critiques of this flawed apologetic work (which is basically "baptised" circular reasoning and fideism), see:

Presuppositionalism: Fideism built on skepticism

Against Presuppositional Apologetics

Brief Critique of Presuppositionalism

Critique of Presuppositionalist Christian Apologetics (Specifically the Van Tillian Version)

More James White Orwellian "Doublethink": Greg Bahnsen Thought R.C. Sproul & John Gerstner Were Exceedingly Stupid Too, Regarding Presuppositionalism

For a good book-length critique of Cornelius Van Til and his apologetic methodology, see Classical Apologetics, eds. John H. Gerstner, Arthur W. Lindsley, and R.C. Sproul (Zondervan, 1984).