To the Editor.—
The editorial by Samuel Vaisrub, MD, "To the Best of Our Knowledge, Which Is Limited at Best" (241:278, 1979), was delightful, and its point was unhappily correct.It brought to my mind that demolisher of analytical studies, "to the best of our knowledge," or "as far as we know." It goes like this:We treated so many people, and we know this many are well, and so many have died; and this many, from whom we have not heard, are alive and well, as far as we know.Someone from whom you have not heard is more likely to be dead than alive.