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Codex review: the body-horror boundary was directionally right but a hair too broad — black-hole/cosmology, lunar-regolith engineering hazards, and a microplastics measurement-methodology piece were rejected on dramatic vocabulary alone (cortisol 4–6). Add scoring guidance: score cortisol by the reader's personal/visceral/public-health threat, not by dramatic words or subject grandeur. Distant astronomy, equipment hazards, geological forces, scientific self-correction, natural-history mechanisms, predator–prey biology, and historical discoveries are LOW cortisol (0–3) even when worded "deadly"/"lethal". Reserve high cortisol for disease, contamination, outbreak, parasites, violence, or immediate suffering. Verified: black hole / moon / microplastics now accept (cortisol 1–2); parasite (8), Ebola (6), hantavirus outbreak (6) still reject. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>