static S ai_standardAnswerEval_dollarVars(S s) {
  for (Pair<S> p : ai_texts_verified_bothQuoted("is a good eval for user input")) {
    SS match = matchDollarVarsIC(p.b, s);
    if (match != null)
      ret smartBotEval(formatDollarVars(p.a, match));
  }
  null;
}