The mechanic worth keeping: browsers match a URL fragment against element ids
RAW first and percent-decoded only second, so a raw rel on both the anchor and
the id is ambiguous rather than merely unencoded — and encoding one side only
relocates the collision.
The count worth keeping: five falsifiers in one unit were green under the exact
change they forbade, three arms finding the same one independently. A
guard-strength pass is the highest-value part of a panel on a diff that is
already well tested, because the findings sit in the gaps the comments are most
confident about.