diff --git a/agent/finalize.go b/agent/finalize.go
index ed08094..64c348d 100644
--- a/agent/finalize.go
+++ b/agent/finalize.go
@@ -304,10 +304,10 @@ func isCitationsOnly(s string) bool {
 // ratio in isSubstantiveAnswer keeps a matching closer in place when nothing
 // earlier clearly outweighs it.
 //
-// Only pointsAbove is used here, not the whole isBackRef class: backRefRe's
-// fixed phrases can appear anywhere in the text, and a 300-byte closer has
-// room for a real answer that merely mentions "as I said" mid-sentence.
-// pointsAbove is offset-bounded, so it stays anchored to the opening.
+// pointsAbove is used here; its sibling backRefRe is NOT. Those fixed phrases
+// are matched anywhere in the text, and a 300-byte closer has room for a real
+// answer that merely mentions "as I said" mid-sentence. pointsAbove is
+// offset-bounded, so it stays anchored to the opening.
 func isSummaryCloser(s string) bool {
 	t := strings.TrimSpace(s)
 	if t == "" || len(t) > summaryCloserMaxChars {