static AutoCloseable watchSpeechConfirmations_fromStart(final VF2<S, S> r) {
  ret watchStructureLog_fromStart(speechConfirmationLogFile(), voidfunc(O o) {
    if (o cast Map) {
      S heard = getString(o, 'heard), corrected = getString(o, 'corrected);
      if (empty(heard) || empty(corrected) || eqic(heard, corrected)) ret;
      callF(r, heard, corrected);
    }
  });
}