A pedestrian is hit by a car. He sues the driver, seeking compensation for his injuries. He wins that compensation. Does this now mean the accident never happened? Of course not. Well, not unless you follow the strange logic that the UK Investigatory Powers Tribunal did when, in December 2014, it found that GCHQ’s involvement in NSA surveillance was sufficiently transparent—when the only thing that made it transparent enough was information the agency disclosed, in court, after being sued.