anchor.diff:              check_ancestor_counted_in_quorum(),
               check_not_found_counts_for_descendant(),
               check_worker_error_skipped(),
  +            check_quorum_only_counts_valid_responses(),
               check_not_found_replies_are_removed_when_doc_found(),
               check_not_found_returned_when_one_of_docs_not_found(),
               check_not_found_returned_when_doc_not_found()
  
positive.code:     worker_count,
      workers,
      reply_count = 0,
      r,
      revs,
      latest,
  
negative.code:                     tree_replies(PrevReplies, tree_sort(RawReplies)),
              NumLeafs = couch_key_tree:count_leafs(PrevReplies),
              SameNumRevs = length(RawReplies) == NumLeafs,
              QMet = AllInternal andalso SameNumRevs andalso QuorumReplies,
              {NewReplies0, QMet, Repair0};
          false ->
              {NewReplies0, MinCount} = dict_replies(PrevReplies, RawReplies),
  