Most LLMs have an accuracy benchmark for controlled questions & answers.

Even if this accuracy is 95% then in a complex system the probability of getting to the right answer diminishes with each new step being added. This is also the key tenet of an agentic system.

While the analysis in the blog is excellent but an answer needs to be found. A layer on top of LLMs for error control/check.

As an analogy, in the analog to digital transmission stack of OSI, an error correction mechanism such as frame check sequence (fcs) detects transmission errors in the data link layer.