Each day, we have to weigh the credibility of a piece of information and decide whether to put our faith in it.
The Sunlight Foundation has unveiled a tool that will help us all with this work. "The tool is, essentially, an open-source plagiarism detection engine," web developer Kaitlin Devine explained. It will scan any text (a news article, e.g.) and compare it with a corpus of press releases and Wikipedia entries. If it finds similar language, you'll get a notification of a detected "churn," and you'll be able to take a look at the two sources side by side.