static synchronized bool deleteFromLogicList(S text) {
  if (empty(text)) false;
  text = trim(text);
  L<S> l = loadLogicList();
  int i = indexOfIgnoreCase(l, text);
  if (i < 0) false;
  l.remove(i);
  saveQuotedLog(logicListFile(), l);
  callOpt(getOpt(mc(), "gLogicList_cache"), "clear");
  true;
}