When you’re in charge of the Library of Congress, there are probably all kinds of pressing practical concerns. Daniel J. Boorstin, twelfth Librarian of Congress, appears to have made time to consider the big picture as well. He is credited with this assertion: "the biggest obstacle to discovery is not ignorance -- it is the illusion of knowledge." Consider what this could mean for your analytics data and your business. If your analytics relies on legacy spreadsheets developed over the years in various departments, if the uploading of tracking codes and classification tables into your analytics tool is done by hand, if you find that your reports aren’t always capturing the data you want due to corruptions or mis-classifications of your campaign codes, then instead of knowledge about your business, you’re likely laboring under the illusion of knowledge. That’s why you have the sense that your reports aren’t giving you the whole story. That’s why you don’t feel you can trust them.