static L<GazelleTree> dm_gazelle_reasonAboutChatInput_v2(S userName, S content, O... _) {
  bool debug = boolPar debug(_);
  LS preContext = cast optPar preContext(_);
  GazelleEvalContext ctx = cast optPar ctx(_);
  if (ctx == null) ctx = dm_gazelle_stdEvalContext(dm_gazelle_allRulesWithComment(optPar requiredComment(_, "discord")));
  Set<S> acceptablePurposes = cast optPar acceptablePurposes(_);
   
  if (debug)
    print(" == PROCESSING INPUT: " + content);
  
  // Need input as first condition
  ctx.engine.dropRulesWhere(r -> cicOneOf(r.comments, "in 1 = statement", "in = statement", "disable"));
  
  if (acceptablePurposes != null) {
    if (debug) print("Purposes: " + acceptablePurposes);
    ctx.engine.dropRulesWhere(r -> !acceptablePurposes.contains(unnull(r.purpose)));
    if (debug) print("Retaining " + n2(ctx.engine.rules, "rule"));
  }
    
  if (debug) print("Have rules: " + collect globalID(ctx.engine.rules));
  
  gazelle_addHelpers(ctx, _);
  
  O[] params = litparams(firstConditionOnly := true, dialogHistory := preContext, +debug,
    badComments := optPar badComments(_),
    acceptablePurposes := optPar acceptablePurposes(_),
    respondingToHuman := optPar respondingToHuman(_));
  
  GazelleTree tree1 = new(ctx, content);
  L<GazelleTree> l = dm_gazelle_getChildren(tree1, params);
  
  //if (debug) print("Tree size: " + l(l));
  
  //dm_gazelle_matchAdditionalInput2(l, preContext, _);
  
  SS inputMap = gazelle_inputMapFromLineAndHistory(content, 
    listPlus(preContext, content));
  if (debug) print("reasonAbout inputMap=" + sfu(asTreeMap(inputMap)));
  dm_gazelle_matchAdditionalInput3(l, inputMap, _);
  
  if (nempty(userName) && !boolPar skipUserName(_)) {
    GazelleTree tree2 = new(ctx, optCurly(userName) + " says: " + content);
    /*if (debug)*/ print("Tree2: " + tree2);
    l.addAll(dm_gazelle_getChildren(tree2, paramsPlus(_, tree2 := true));
  }
  
  Long userID = cast optPar userID(_);
  
  if (userID != null && userID != 0 && !boolPar skipUserID(_)) {
    GazelleTree tree3 = new(ctx, "user with id " + userID + " says: " + content);
    l.addAll(dm_gazelle_getChildren(tree3, paramsPlus(_, tree3 := true));
  }
  
  if (boolPar skipBad(_, true)) l = [GazelleTree t : l | neq(t.prediction, 'bad)];
  gazelle_sortChildren(l);
  
  dm_gazelle_matchStatements_v2(l, passParams(_, 'debug, 'dm_gazelle_matchStatementsDebug));
  for (GazelleTree t : l) t.flush();
    
  int n = l(l);
  l = gazelle_dropUnsatisfiedEntries(l);
  if (debug) print("Filtered out " + (n-l(l)) + " unsatisfied entries (keeping " + l(l) + ")");
  gazelle_dropMatchedDefaultRules(l);
  
  ret l;
}