Because it very obviously isn't. For example (though this is a year or so ago), look at when people hooked Claude up to Pokemon. It got stuck on things that no human, even a small child, would get stuck on (such as going in and out of a building over and over). I'm sure we could train an LLM to play Pokemon, but you don't need to train a child to play. You hand them the game and they figure it out with no prior experience. That is because the human is intelligent, and the LLM is not.

Because LLMs are language generation machines based on statistics - they do not analyse the underlying data, let alone understand it. They are not AI.

Ah yes, proving a negative. What makes you sure a stone is not capable of cognition?

Nice try. The onus is on you to prove the extraordinary claim that we have invented actual artificial cognition.