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 cc0b3475..32c1c586 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
@@ -327,3 +327,8 @@ names the principle that settles it, and is cited as "design 47 G A-n".
   the revision `source` names, which the indexer holds itself; no field is added to `package-published`. For a build
   of another watched branch, kind 1 compares with that branch's newest build, kept as heard in `heard` as
   `branch-build.<module>.<branch>` (the digest `package-published` carries), not with a released digest.
+- **A-84** (§194 and its candidate's-view line, §348, §473; principle 1) The builder follows no candidate: only a run's
+  steps read a candidate's view, so the builder learns a candidate's build from the run's build step ask, which names
+  each entry by fingerprint; it reads each entry through `mesh-catalog.entry` (repository and commit are the member's
+  head) and needs no pull request number, a build being per fingerprint. Its read of the indexer's `candidates` view
+  goes.