– Can't make heads or tails of your taxes? Well don't feel too bad, because at least one former secretary of defense can't either. Donald Rumsfeld sent his tax returns the IRS along with a cheeky letter informing them that he has "absolutely no idea" whether they're accurate. Rumsfeld posted the letter to Facebook and Twitter, adding that he sends a similar letter every year. "This note is to alert you folks that I know that I do not know whether or not my tax returns are accurate, which is a sad commentary on governance," he wrote. "The tax code is so complex and the forms are so complicated that I know that I cannot have any confidence that I know what is being requested." We'd make a "known unknown" joke here, but the Economist beat us to it.