*Facebook Doesn’t Tell Users Everything It Really Knows About Them* /The site shows users how Facebook categorizes them. It doesn’t reveal the data it is buying about their offline lives. / by Julia Angwin, Terry Parris Jr. and Surya Mattu ProPublica, Dec. 27, 2016, 8 a.m. https://www.propublica.org/article/facebook-doesnt-tell-users-everything-it-...