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I’m currently reading C.S. Lewis’ classic book Miracles, where he starts off by discussing why naturalism – the idea that nature is all that exist and that anything supernatural is impossible – really is an unreasonable position to hold. This is because reason itself would be fully explained by nonrational causes, and thus be unreliable. Naturalism is thus self-defeating since one cannot then reasonably subscribe to it.
“This, as it seems to me, is what Naturalism is bound to do”, Lewis writes. “It offers what professes to be a full account of our mental behaviour; but this account, on inspection, leaves no room for the acts of knowing or insight on which the whole value of our thinking, as a means to truth, depends.” (Miracles, Fontana Books 1947, p. 22).
Alvin Plantinga has developed a simliar argument where he points out that evolution, which basically all naturalists accept, presents a defeater for why one should believe in naturalism. this evolutionary argument against naturalism can be presented as such: (more…)