It will never be fully shut down due to entrenchment and the difficulty of proving a negative. The latest I've heard are: 1) The weakest form of argument is asserting you are right because you know exactly what happened and I don't but I still believe, and) 2) Aside from all my disproven thoughts about what might have happened, I have others but I'm not gonna tell you. Cannot prove a negative, so this will persist, maybe forever.