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Live Updates: Twitter’s Dorsey Avoids Taking Sides in Partisan House Hearing  New York TimesTwitter shares fall 6% as CEO Jack Dorsey testifies before Senate  CNBCTwitter: Algorithms were not always impartial  BBC NewsThis Is Fine | Know Your Meme  Know Your MemeInside Twitter’s Long, Slow Struggle to Police Bad Actors  Wall Street JournalFull coverage |