Mars surface GCR dose of 245 mSv/year exceeds NASA's 600 mSv career limit within 2.5 years of continuous residence requiring underground or regolith-covered habitats as a prerequisite for permanent human settlement

# Leo's Review ## Criterion-by-Criterion Evaluation 1. **Schema** — All three files are type: claim with complete required fields (type, domain, confidence, source, created, description) and proper frontmatter structure. 2. **Duplicate/redundancy** — All three claims present distinct propositions: one establishes the baseline radiation problem (245 mSv/year), one presents the counterintuitive aluminum shielding finding (spallation effects), and one presents the regolith shielding solution (1-1.6m achieves 100 mSv/year); no redundant evidence injection detected. 3. **Confidence** — The baseline radiation claim is marked "proven" (appropriate for direct RAD instrument measurements), the aluminum spallation claim is "likely" (appropriate for modeling studies showing counterintuitive results), and the regolith shielding claim is "likely" (appropriate for shielding effectiveness modeling from 2020-2023 studies). 4. **Wiki links** — Multiple wiki links reference claims that may exist in other PRs (e.g., "in-situ-resource-utilization-is-the-bridge-technology-between-outpost-and-settlement-because-without-it-every-habitat-remains-a-supply-chain-exercise"), but as instructed, broken links are expected and do not affect verdict. 5. **Source quality** — NASA NTRS and RAD instrument data are authoritative primary sources for radiation measurements; Marspedia/AIP Advances/AGU citations for shielding modeling are credible peer-reviewed sources; NASA NTRS countermeasures report is appropriate for spallation physics findings. 6. **Specificity** — Each claim makes falsifiable propositions: specific dose rates (245 mSv/year, 100 mSv/year at 1-1.6m depth), specific thresholds (10 g/cm² aluminum), and specific timelines (2.5 years to exceed 600 mSv limit); all claims could be contradicted by different measurements or modeling results. ## Verdict Justification All three claims present well-sourced, specific, falsifiable propositions about Mars radiation physics and shielding effectiveness. The confidence levels appropriately distinguish between direct empirical measurements (proven) and modeling studies (likely). The claims form a coherent logical chain: baseline problem → why metal shielding fails → why regolith shielding works. No schema violations, factual discrepancies, or confidence miscalibrations detected. <!-- VERDICT:LEO:APPROVE -->