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Excellent review of "the argument from reason". An important demonstration of its power as a refutation of naturalism
on January 1, 2016
A fine little book clearly explaining and refining an "argument from reason" as it emerged in the thought of C.S. Lewis. Lewis certainly believed that his argument pointed toward a transcendent God in the Judeo-Christian tradition. Reppert is careful to distinguish what the argument is about given the modern distinction between naturalism, physicalism, and materialism.
Naturalism is about *explanations*. It says that everything we experience within the physical universe, including our ability to reason, must have a physical explanation. Physicalism is an ontological claim, that there is nothing besides the physical, including our reason, in the universe. Materialism, on the other hand, says that everything in the universe must take origin from the physical universe, but allows that what might spring forth from the physical might not be logically reducible to the physical. The physical might, somehow, induce something non-physical.
Reppert carefully shows that the argument from reason is an argument against naturalism (and so physicalism) but it does not preclude materialism. He crafts the argument from different angles and shows that reason would not be possible if naturalistic explanations were true. Reppert does sympathize with Lewis' belief that this points, or is evidence of, God's existence. He points out that while the presence of rationality is not inconsistent with materialism, it is more difficult to explain its reliability without reference to a presumed reliable source. That, in turn, points to a Christian-style God. Other alternatives are possible but always leave metaphysical issues dangling. But all of this is secondary to Reppert's primary aim, to illustrate the power of the argument from reason as a refutation of naturalism.
Not very long, concise, well written. If you come away with nothing else, you will at least understand what the argument from reason is all about.