Twitter on Sunday banned the personal account of Georgia congresswoman Marjorie Taylor Greene for multiple violations of its Covid-19 misinformation policy, according to a statement from the company. Greene’s account was permanently suspended under the “strike” system Twitter launched in March, which uses artificial intelligence to identify posts about the coronavirus that are misleading enough to cause harm to people. Two or three strikes earn a 12-hour account lock; four strikes prompt a weeklong suspension, and five or more strikes can get someone permanently removed from Twitter. Her office did not immediately respond to a request for comment. Twitter had…