The Absurdity of Denying Logic

We reach our knowledge of the universe only by inference. The very object to which our thought is suppose to be irrelevant depends on the relevance of our thought. A universe whose only claim to be believed in rests on the validity of inference must not start telling us that inference is invalid. That would really be a bit too nonsensical. I conclude then that logic is a real insight into the way in which real things have to exist. In other words, the laws of thought are also the laws of things: of things in the remotest space and the remotest time.

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C. S. Lewis, “De Futilitate,” in Christian Reflections (Grand Rapids: William B. Eerdmans Publishing Co., 1995), 63.