Americans aren’t exactly known for our knowledge of history (or geography, for that matter). But we should at least know our own presidents, right? Enter these researchers, who used an online survey to measure how well people can distinguish real U.S. presidents from others with well-known or presidential-sounding names. They found that, while people were actually able to recognize 88% of U.S. presidents by name (the exceptions including lesser known presidents like Franklin Pierce and Chester A