She asked him to share his screen. The chatbot window flickered.

A recruiter conducting an ML system design interview grew suspicious when a candidate delivered fluent answers but couldn't explain his reasoning. She asked him to share his screen and diagram the architecture. He froze. A chatbot window flickered briefly in the background before he closed it. The interview was terminated immediately. The recruiter later posted: "He was talking without thinking. The moment I asked him to draw what he'd just described, it all fell apart."