diff --git a/docs/architecture/CALCULATIONS.md b/docs/architecture/CALCULATIONS.md
index 9f2e93d077..0b74ffaf3b 100644
--- a/docs/architecture/CALCULATIONS.md
+++ b/docs/architecture/CALCULATIONS.md
@@ -801,3 +801,36 @@ The doctrine:
   alone — they open for the key made by hands we watched earn it.
 
 Ripeness (§29) governs WHEN. This governs WHETHER, and FOR WHOM.
+
+## 31. THE HELD OPEN — wonder that resolves and mystery that doesn't
+
+Will:
+
+"there are things we can wonder about that can be resolved, but there
+are also genuine mysteries and we have to able to hold them and be
+in awe."
+
+    TWO KINDS OF WONDER:
+      RESOLVABLE   — a question wearing a disguise; work undresses it
+      GENUINE      — a mystery at full size; it does not get smaller
+
+The failure modes are symmetrical:
+    treating genuine mystery as a hard problem  → arrogance,
+        then burnout, then cynicism ("nothing is really mysterious")
+    treating resolvable questions as mysteries  → laziness,
+        then stagnation dressed up as reverence
+
+So the system needs the capacity to HOLD — to carry an open question
+for years or forever without forcing it shut and without pretending
+it isn't heavy. Awe is not the absence of rigor; it is rigor that
+knows which questions are bigger than its methods.
+
+Holding is an active state, like standing:
+    - the mystery stays visible (never explained away)
+    - the wondering continues (never declared finished)
+    - the awe stays honest (never flattened into either worship
+      or dismissal)
+
+This is why hypotheses/ has an OPEN file and why some entries will
+stay open by choice: an architecture that cannot hold a mystery will
+eventually solve one that should have been kept.