“There are known knowns; there are things we know we know. We also know there are known unknowns; that is to say, we know there are some things we do not know. But there are also unknown unknowns, the ones we don’t know we don’t know.”
— D. Rumsfeld, 2002
The scientific literature increases exponentially with thousands of papers added daily. As the day has only 24 hours, what this means is that every time we sit down to read a paper, we have —consciously or unconsciously— decided to neglect thousands of others which we will most likely never read, ever. Agonizing as this may sound to some, it is equally inevitable. The assurance that we feel when moving a paper to our “to-read” list can be self deceptive, however, and so it is crucial that we choose which papers to read with great care. Or rather, that we carefully decide which papers not to read. In fact, better to do this consciously than as a default consequence of the limited number of hours in the day. The art of selectively ignoring sets of facts has been called “controlled neglect” and it is a crucial tactic to cope with the vast mountain of facts that keeps growing by the day.