diff --git a/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md b/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
index e696eec4..d6d5f1fa 100644
--- a/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
+++ b/03-DESIGN/01-to-be/47-milestones/G-20-lead-answers.md
@@ -58,3 +58,6 @@ names the principle that settles it, and is cited as "design 47 G A-n".
 - **A-14** (§580; principles 7 and 8) A finding that told several findings of one kind on one id apart by a `ref` puts that
   part into its id (`<id>.<ref>`, each escaped as §73 escapes a name); a kind stays a fixed word of its bundle's list. The
   key's scope and id and the subject's scope and id are set equal, as before.
+- **A-15** (§614; principle 3) In the branch follower an `entry` the holder refuses is `not-found`; a transport error leaves
+  it `asked` and is asked again; each part writes `entry-not-found` from the follower's changes. As built in mesh-delivery
+  ab616fa6.