Absolute drivel. It is a useless frame of reference in which one would have to sit on the fence on every mythical creature ever mentioned.

"possibilianism" would cover leprechauns equally as well as god. It would cover santa right along with god. Unicorns as well, the flying spaghetti monster, etc. It is beyond useless.

EDIT: Author also thinks "faith" should be taught in public schools. http://biologos.org/blog/science-religion-can-coexist-in-sch...