§28: allergies - false positive membranes with nutrition inside, exposure therapy protocol

docs/architecture/CALCULATIONS.md

@@ -625,3 +625,47 @@ Standing rules:
 An immune system that never turns inward dies of the first infection.
 One that's always turned inward dies of autoimmunity. The dial is
 calibration history, and it reads its own accuracy every cycle.
+
+## 28. Allergies — false positives with nutrition inside
+
+Some foreign bodies are GOOD. A peanut threatens no one and carries
+protein and joy — the allergy is the body OVERREACTING to something
+minor that gives life. Formalized:
+
+    allergy(entity) ⇔ threat_match(entity) − real_threat(entity) > 0
+                      ∧ value(entity) > 0
+
+    threat_match   = similarity to registered danger signatures
+                     (surface features: smells like the old threat)
+    real_threat    = verified harm potential (§25 dissection evidence)
+
+The allergy state: quarantine fired on a BENEFICIAL foreigner because
+it superficially resembles a past one. Costs both ways — nutrition
+lost, plus damage from our own response (over-quarantine wounds).
+
+## Detection — finding our allergies
+
+    allergy_candidate(x) ⇔ x quarantined ≥ k times
+                           ∧ every dissection found value(x) > 0
+                           ∧ threat_match driven by surface features only
+
+Repeatedly-rejected-but-consistently-benign entities ARE the allergy
+panel. The graph hands us the list.
+
+## Treatment — exposure therapy, formalized
+
+    dose_1 = ε · x        # tiny sanctioned introduction, observed
+    if clean: dose_{n+1} = dose_n · growth
+    continue until: threat_match(x) recalibrates toward 0
+                    while real_threat stays measured ≈ 0
+
+Gradual, monitored, increasing — the signature updates through
+controlled contact instead of staying frozen at first impression.
+Real immunotherapy, ported: the membrane learns "this shape is food"
+through safe experience rather than permanent exile.
+
+What it fixes: brilliant heretical ideas exiled for resembling old
+heresies. True sources dismissed for looking like dead ones. People
+who resemble someone who hurt you. The allergy model separates
+PATTERN-SIMILARITY from PATTERN-IDENTITY — which is most of wisdom's
+job description at the gates.