If it doesn't work, stop it

Editor—Alderson and Groves suggest that “what we don't know we don't know would be a good topic for a BMJ theme issue.”¹ But, do you know what? It couldn't be done. For to write about what we don't know, we must surely know we don't know it first, otherwise how could it be an issue?

The only way it could work would be that those who know they don't know something, but think the rest of us don't know we don't know it, write about it so that the rest of us then also know we don't know it. Then everything in that issue will no longer be unknown unknowns, but known unknowns. Do you know what I mean?