Margaret Sullivan, the longest-serving of the New York Times public editors, talks about the awkwardness of being the paper's in-house critic, the process of choosing to elevate some criticisms over others, and why — when she was chief editor of The Buffalo News, before taking the job at the Times — she reacted with "horror" when her publisher suggested they hire their own public editor.For tickets and info about the Northside Festival, visit northsidereport2017.eventbrite.com.