Comparing Incompatible Test Methodologies: Why "0% Hallucination" Claims Often Mean Nothing Useful

https://technivorz.com/how-a-12m-healthtech-startup-nearly-triggered-a-hospital-incident-using-an-llm/

Which specific questions about model hallucination and testing will this article answer, and why do they matter? Many vendor claims read like simple scorecards: "Model X has 0% hallucination