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Knowing Is Not Doing: When LLM Agents Pass the Task but Fail the World

Opening — Why this matters now LLM agents are getting disturbingly good at finishing tasks. They click the right buttons, traverse web pages, solve text-based games, and close tickets. Benchmarks applaud. Dashboards glow green. Yet something feels off. Change the environment slightly, rotate the layout, tweak the constraints — and suddenly the same agent behaves like it woke up in a stranger’s apartment. The problem isn’t execution. It’s comprehension. ...

January 15, 2026 · 4 min · Zelina