anchor.diff:                     -> {boolean() | consistant, #rr_replies{}, pr:pr()}.
   add_rr_reply(Replies, _DBSelector, SeenReadRound, SeenWriteRound, Value,
                Datatype, Filters, _Cons) ->
  -
       %% increment number of replies received
       ReplyCount = Replies#rr_replies.reply_count + 1,
       R1 = Replies#rr_replies{reply_count=ReplyCount},
  
positive.code:                                            entry_datatype(NewEntry),
                                             entry_filters(NewEntry),
                                             entry_retrigger(NewEntry),
                                             1+pr:get_r(entry_my_round(Entry))}, State)
              end
      end;
  
  
negative.code:                         Collected = R3#rr_replies.read_value,
                          ReadValue = ?REDUNDANCY:get_read_value(Collected, ReadFilter),
                          T1 = R3#rr_replies{read_value=ReadValue},
                          {consistent, T1};
                      false ->
                          %% not a consistent quorum
  