1 RCE, 2 AI Models, 0 Ways to Tell Who Was Right

(This happened to a friend of mine. The story is only lightly edited, and his name is not Jerry.) Jerry got into vibe coding a while ago. He&rsquo;d been using Claude Sonnet 4.6, the default model at the time. It was fine. Then he ran into a problem Sonnet couldn&rsquo;t fix (he can&rsquo;t remember what it was now). Worse, it started contradicting itself. X is the root cause. X isn&rsquo;t the…