To coincide with the recent release of my book The Nativity: A Critical Examination, I wrote a couple of posts concerning issues with the nativity accounts in Luke and Matthew on the Debunking Christianity blog. One Christian commentator, Vincent, made replies to many of my points, all of which I rebutted. There was one point on which he pushed and that was a thesis by Christian physicist Frank Tipler that sets out to defend the Star of Bethlehem from a naturalistic standpoint. Tipler hypoth...