[[File:Cerebellum.jpg|right|thumb|240px|If [[Naturalism (philosophy)|philosophical naturalism]] were true, then we ought not to trust our capacity for reason for the human brain would be a byproduct of blind/unintelligent natural forces.
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*[http://creationevolutiondesign.blogspot.com/2006/09/cs-lewis-argument-from-reason.html C.S. Lewis' argument from reason]
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*[http://www.evolutionnews.org/2013/11/cs_lewis_and_th079541.html C.S. Lewis and the Argument from Reason] by Jay W. Richards, November 25, 2013
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*[http://www.acton.org/pub/religion-liberty/volume-6-number-6/cs-lewis-and-materialism C.S. Lewis and Materialism] by John G. West
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*[http://wmbriggs.com/blog/?p=8669 C.S. Lewis On The Validity of Reasoning]
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*[http://truthbomb.blogspot.com/2012/04/cs-lewis-on-rationality-and-materialism.html C.S. Lewis on Rationality and Materialism ]
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*[http://str.typepad.com/weblog/2008/08/naturalisms-hot.html Naturalism's Hot Water]
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See: [[Atheism and reason]] and [[Atheism and the brain]] ]]