You may have read about Knowledge-Based Trust, a Google research paper that describes a method of scoring web documents according to the accuracy of facts.  Knowledge-Based Trust has been referred to as the “Truth Algorithm”, a way to assign a Trust Score to weed out sites that contain wrong information.  “Google wants to rank websites based on facts not links.” The idea is to identify key facts in a web page and score them for their accuracy by assigning a trust score.  Read More about Google’s Truth Algorithm