Not really, since any LLM will answer all those questions competently. It's a known fact that LLMs sometimes are wrong and hallucinates an answer, but this is exceedingly rare. Having access to a decent LLM is like having an expert with me. Are they always right? No, but the analogy with a two year old simply doesn't hold up.
> Since any LLM will answer all those questions competently
That's false. The LLM will only answer competently if it was trained on that data; and if it has enough data to make the correct connections between your question and the "correct" answer.
In the case of this article they're specifically saying the LLM has limited training.