From Richard Carrier’s blog post, McGrath on OHJ: A Failure of Logic and Accuracy:
In preparation for my upcoming defense of On the Historicity of Jesus at the SBL regional meeting, I’ve set aside time to publicly summarize my take on James McGrath’s critique of (parts of) the book for Bible & Interpretation: “Did Jesus Die in Outer Space? Evaluating a Key Claim in Richard Carrier’s On the Historicity of Jesus.”
Critics have already adequately shown the problems with McGrath in understanding facts and logic, so I don’t need to reproduce their work. I fully concur with the responses of Covington and Godfrey (any quibbles I have I’ll mention here).
As Godfrey correctly shows, McGrath not only botches logic and facts, he misreports what my book says, such that “uninformed readers are falsely led to think McGrath has simply identified errors in Carrier’s work.” When in fact he did not identify any. And Covington rightly concludes that when you compare what McGrath says with what my book says, “he hasn’t said anything an agnostic onlooker of the debate should take note of.” They both show that McGrath gets my arguments wrong, makes obvious logical mistakes, and incorrectly reports what experts have said in key matters. This does not make historicity look well defended. It makes it look like it needs rhetorical warblegarble to survive.
The most detailed response to McGrath’s paper is that of Neil Godfrey [who discusses issues of method and fact]. But for a good brief response to start with, see Nicholas Covington, which is ideal for anyone who wants a TL;DR on the matter. . . . .