Claim Verification: "The mean neutron lifetime measured in beam experiments is more than 1 second shorter than the lifetime obtained from ultracold-neutron bottle experiments." — Disproved

Automated fact-verification of the claim: "The mean neutron lifetime measured in beam experiments is more than 1 second shorter than the lifetime obtained from ultracold-neutron bottle experiments." Verdict: DISPROVED Key Findings The beam experiment world average for the neutron lifetime is 887.7 +/- 2.2 seconds (B1). The bottle (ultracold neutron) experiment world average is 878.5 +/- 0.8 seconds (B1). The difference (beam minus bottle) is +9.2 seconds (A1) — beam experiments measure a longer lifetime, not a shorter one. The claim asserts the opposite direction: that beam is shorter. This is false by approximately 10 seconds. 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 v0.10.0.