Jeri: " a lot of people still believe that acid causes duodenal ulcers simply because 1) it's become folklore"
No, a lot of people still believe that acid causes duodenal ulcers simply because it was put forward as the medical establishment's viewpoint. If the establishment have now changed their viewpoint that is not a good enough reason for the layman to accept the change. The 'experts' have accepted they were wrong before, why should people accept that their new version is any more accurate?

Nigel