Previously I had written something brief in response to Marshall's chapter on the Outsider Test in the book True Reason: Confronting the Irrationality of the New Atheism. I was thankful that at a minimum he embraces it (with caveats) against Victor Reppert, Randal Rauser, Matthew Flannagan, Norman Geisler, Mark Hanna, Thomas Talbot and some others. LINK I was planning on writing a longer response but didn't get around to it. Now I don't need to, for the Arizona Atheist has done so as he's reviewing each chapter in that book. He says:
Each of David Marshall’s arguments against the OTF fail. His next tactic, regardless of how illogical it may be, is to argue that Christianity has passed the OTF “billions of times.” (59) If an argument is by its nature “flawed,” as Marshall contends, how then, can he possibly believe arguing that “billions” allegedly passing this flawed test is proof that Christians have come to their faith in a rational manner? See more here.