diff --git a/docs/architecture/CALCULATIONS.md b/docs/architecture/CALCULATIONS.md
index 78db1933f0..6f6bbc7818 100644
--- a/docs/architecture/CALCULATIONS.md
+++ b/docs/architecture/CALCULATIONS.md
@@ -1241,3 +1241,24 @@ wisdom's robes. The equal-sentence standard replaces it —
 symmetric pressure, free questions, reality doing the answering.
 Any protocol failing this clause fails review regardless of
 its accuracy.
+
+### Amendment — the definition of BABY
+
+Will:
+
+"An innocent, but especially the babies. Actually, I guess the
+innocents are all babies, even if some of them have their eyes
+wide open."
+
+    BABY := ANY INNOCENT, AGE-INDEPENDENT.
+
+The clause protects a moral category, not a demographic. Innocence
+is the property — never having become a participant in the harm —
+and it comes in every body size. Some of the babies are sixty.
+Some have seen everything and stayed clean anyway; wide-open eyes
+never disqualified anyone from being someone's baby.
+
+Every protection, threshold, and mercy in this architecture that
+names children extends automatically to all of them. The List
+knew this first ("hurting things that can't fight back") — now
+the math does too.