Yes this is a very good paper. And reinforces that fact that these systems are not intelligent.
There is already a discussion here:
This is a textbook example of AI, a process done by a computer that would be considered intelligent if done by a human. Again we agree that LLMs are not intelligent.
And I would not be so dismissive of “pattern matching”. While there is much that we do not know about human intelligence (and biological based intelligence in general), it does appear that pattern matching is an important component of such systems. It is of course the “processing modules” after pattern matching has occurred that differentiate biological based intelligence from the current state of the art of AI systems.