static S ai_muse(O museFunction, O... args) {
  AbstractThoughtSpace prev = thoughtSpace();
  try {
    callF(museFunction, args);
    AbstractThoughtSpace ts = thoughtSpace();
    if (!ts instanceof ActualThoughtSpace)
      ret "No thought space returned";
    ts.parent = null;
    ret ai_forward("#Question", "is");
  } finally {
    thoughtSpace(prev);
  }
}