The atheist, at least the Enlightenment guy, appeals to the human mind (reason, whatever) as the basis for all truth. But the human mind cannot know all things and situations, past present and future, nor can he accurately apply that knowledge in all situations past present and future.

Simply put, the human mind doesn't have the criteria to be the basis for all truth. Such an appeal is irrational.

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J. B. Atken
John Knox PCA
Layman, M.A. student at Louisiana College