Gordon Haddon Clark was an American philosopher and Calvinist theologian. He was a primary advocate for the idea of presuppositional apologetics and was chairman of the Philosophy Department at Butler University for 28 years. He was an expert in pre-Socratic and ancient philosophy and was noted for his rigor in defending propositional revelation against all forms of empiricism and rationalism, in arguing that all truth is propositional and in applying the laws of logic. His system of philosophy is sometimes called Scripturalism.
Clark does a fantastic job dissecting the development of scientific methodology and philosophy through the ages. He gives fantastic insight into the unfolding diversity of thought and dialogue. Especially enjoyable is the time he spends on the development of scientific skepticism and on the historical assertions concerning the spiritual and theological. Clark concludes the very way in which we do science itself shows that it does not answer questions of what reality is, though it does provide a useful system nonetheless. Science can never dictate what is or isn't true concerning the spiritual and the theological, because it never dictates the reality of the physical and the observable in the first place.