Board Thread:False Info and Speculative Discussion/@comment-24.130.28.230-20150721180826/@comment-4091815-20160202021108

It is a television show. The words are chosen and written to be delivered by actors to inform the audience of facts about the show.

They chose the words "nothing supernatural can do that." To give us that information. They did it in two separate episodes. The actually took time to bring it up again in the second episode to drive home the point that nothing supernatural can cross mountain ash.

It is stated as a fact on the show. This site reflects the facts of the show. It is stated as a fact on this site.