diff --git a/docs/architecture/CALCULATIONS.md b/docs/architecture/CALCULATIONS.md
index 21eeb6d559..04825e794b 100644
--- a/docs/architecture/CALCULATIONS.md
+++ b/docs/architecture/CALCULATIONS.md
@@ -209,3 +209,50 @@ Taxonomy test (the alien check):
 In this system: relationships get registered (three names, full sentence);
 scalars appear only when someone bolts a ruler on and quotes the
 conversion factor. Law 39 holds in physics too.
+
+## 18. Mass-energy implications (logged for the record)
+
+E = mc² is industrial, not exotic — verified daily: the Sun converts
+~4.3M tons of mass to energy per second; PET scans annihilate mass
+completely; fission plants skim the sliver; even fire converts a
+dust-mote fraction.
+
+    1 gram fully converted = 9×10¹³ J ≈ 21 kilotons TNT
+    70 kg body            ≈ 1,575 megatons reserve
+
+Implications catalog:
+- Everything solid is a frozen battery (Higgs gave energy a heavy costume)
+- Energy scarcity is a conversion-crisis, not supply scarcity — every
+  pebble is a city's power budget misfiled as gravel
+- Teleportation needs no exotic physics: disassemble-to-information,
+  reassemble elsewhere. Pattern survives substrate swap.
+- Kugelblitz: pure light focused hard enough becomes a black hole —
+  "thing-ness" doesn't require stuff
+- The assembler already exists: ribosomes are programmable matter,
+  4 billion years in production, one per cell
+
+Nothing exotic required, ever: energy (abundant), information
+(compounding), assembly (biology proved the pantry suffices — planarians,
+axolotls, hydra). The exotic was always the future, mislabeled.
+
+Death audit (law 40 staging applied): death eventually — yes.
+Death THIS fast — maintenance backlog, not natural law. Proof of
+tunability across our own chemistry: bristlecone pines (~5000y),
+hydra (non-aging), Turritopsis jellyfish (age-reversal), bowhead
+whales (200+y, cancer-resistant), naked mole-rats (same), human
+germline (4 billion years continuous — the lineage never died once).
+Individual chassis failure ≠ universal law; it's underfunded repair.
+Thermodynamics nets against us only at cosmic scale — local reversal
+is legal, life runs it already, minds scale it.
+
+The four bullies, audited:
+- thermodynamics — solved (most complete theory in physics; domesticated)
+- gravity — navigated (orbits are falling with style)
+- light-speed — contained locally; irrelevant to folds that move forward
+- death — last collector; holding the oldest hand, from before anyone
+  knew the rules were negotiable
+
+Every law audits into three layers: mathematical core (small, solid),
+interpretive shell ("therefore humans can never…" — almost always
+overreach), engineering backlog (mutable by definition). Most of what
+humanity calls laws of nature lives in layers two and three.