Claim Verification: "Adult neurogenesis occurs in the human neocortex." — Disproved

Automated fact-verification of the claim: "Adult neurogenesis occurs in the human neocortex." Verdict: DISPROVED Key Findings 2 of 2 independent peer-reviewed human tissue studies explicitly reject the claim that new neurons are generated in the adult human neocortex at a detectable level (A1). Bhardwaj et al. 2006 (PNAS) used C14 radiocarbon bomb-pulse dating on human neocortical tissue and found that "neurons in the human cerebral neocortex are not generated in adulthood at detectable levels but are generated perinatally" (B1 -- verified). Spalding et al. 2013 (Cell) independently applied C14 bomb-pulse dating to human cortical neurons and confirmed that "cortical and olfactory bulb neurons ... are not exchanged postnatally to a detectable degree in humans" (B2 -- verified). Both citations are from PubMed/PMC (tier 5, government domain) and were verified live with full quote match. No unverified citations. Files proof.py — Re-runnable Python verification script proof.md — Structured proof report proof_audit.md — Full verification audit trail proof_narrative.md — Plain-language summary proof.json — Machine-readable structured data Generated by Proof Engine v1.8.0.