INK STAINS
PAPERPILE IS JUST A PILE OF PAPERS A PAPER IS JUST [CONTAINER] FOR [DATA] BUT THE FIRST LINE OF EVERY PAPER IS A FINGERPRINT OF THE ONE BENEATH IT W H E N E V E R Y L I N E I S F U L L AND THERE S NOWHERE LEFT TO WRITE YOU NEED A NEW PAPER BUT YOU CANT GET ONE UNTIL E V E R Y O N E IN THE ROOM HAS A COPY OF THE LAST PAPER AND ALL AGREE THEIR COPIES MATCH AND THEY ONLY MATCH IF EVERY FINGERPRINT MATCHES SO NO PAPER CAN CHANGE WITHOUT BREAKING EVERY PAPER ABOVE IT IF ALL PAPERS MATCH THE NEW PAPER LANDS ON TOP AND FINGERPRINTS THE ONE BELOW NOW REPLACE PAPER WITH BLOCK AND PILE WITH CHAIN 4NBT