Comparing Incompatible Test Methodologies: What Claude 4.1 Opus' "0% Hallucination" Claim Actually Reveals

https://www.mediafire.com/file/bj2qr0zejl3ytp4/pdf-8880-1899.pdf/file

1. Why the headline "0% hallucination" is a red flag for careful buyers Why does a clean, absolute number make you uneasy? If a vendor proclaims "Claude 4