We have overestimated the influence of partisan misinformation during political campaigns. But that doesn't mean we're well-informed. Americans know little about important public policy issues and they "know" things that aren’t so. Emily Thorson finds that Americans concoct information about current policy to match what they think they know. It's not that they are fed misinformation but that the media report little about the details of current policy, leaving voters to make up the facts. Correcting this misinformation about existing policy can make a difference and help Americans evaluate new proposals for policy change.