Chapter 8. Miracles: Signs of God or Gullibility? As I read them, Geisler and Turek (G&T) seek to establish four points: (1) If God exists, then miracles are possible; (2) Hume’s argument against the credibility of miracle claims is a failure; (3) miracles can be used to confirm a message from God (i.e., as acts … Geisler & Turek Rebuttal, Part 7: Chapter 8