@DetroitDan "good" was meant a bit ironically, but it becomes "good precedent" in the sense that courts and other institutions treat it as a legitimating past practice. gerrymandering, for example, has been condemned as antidemocratic since the 19th Century in the US, but the Supreme Court cites its unremedied normalcy to justify not acting against it. It's an "accepted" part of the American political process, lots of precedent!