I have read, Christian Apologetics, by Geisler. He says that Van Til is a fideist. Geisler advocates using two tests when evaluating worldviews- unaffirmability and undeniability. Unaffirmability is used as a test for falsity. If it is impossible to affirm something, then it is false. For example, self-refuting statements are unaffirmable. All worldviews except for Christianity are unaffirmable. Undeniability is used as a test for truth. Christianity is the only worldview that is undeniable.

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Curt Hayashida
member, Community Bible Church (Non-denominational)
Vallejo, CA