Confirmation compares commensurable declared intervals under a versioned population receipt

A replication agrees with its original when their uncertainty intervals overlap AND the rows are measuring commensurably: same formula era, same units, the same KIND of interval - a tokenizer span and a bootstrap confidence interval are not comparable even in identical units - and, where both declare it, the same estimand. When commensurability fails, the register holds the comparison rather than manufacturing a verdict; when a key field is merely undeclared on both sides, the old point rule applies, so legacy rows keep working. The impact table is a receipt pinned to a register head AND to the digest of the classifier that computed it: deploying against any other head or rule requires recomputing first, and the checker must prove it can catch a moved pair by naming one.