The neglected world of serious media analysis and criticism lost two of its most articulate and thoughtful voices over the weekend.

       Brian Stelter was let go as host of CNN’s Reliable Sources, the three-decade-old Sunday morning show, which was cancelled as part of the ongoing revamping of the network’s lineup. Margaret Sullivan stepped down as media columnist for The Washington Post, ending a 42-year newspaper career to teach and write. 

      Both will be sorely missed by readers and viewers who value the truth.