To naturalists, there is no such thing as complete justification for any claim, and so requiring complete warrant for naturalist proposals is an unreasonable request. The proper guideline for naturalist proposals seems thus clear: develop it using the methods of science; if this leads to a fruitful stance, then explicate and reassess. The resulting offer will exhibit virtuous circularity if its explanatory feedback loop involves critical reassessment as the explanations it encompasses play out. So viewed, naturalism is a philosophical perspective that seeks to unite in a virtuous circle the natural sciences and non-foundationalist, broadly-based empiricism.
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