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Title: it seemed circular
Review: Lewis warns about arguments that presume their conclusion in the first few pages. Then -- at least to my reading -- he rejects Naturalism (as he defines it) because it is obvious to him that reason is not "natural".I also think he was too slick about the "Naturalism" vs "Supernaturalism" split that he sets up. At first he admits that "Supernaturalism" could mean any number of things (say polytheism). Later he basically assumes it to mean/imply his concept of the Christian God. So almost through misdirection, he gets from showing (what he believes are) inconsistencies with one ontology to using that as support for a different ontology.
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