Ahh… that hypothetical is physically impossible for biology. It just cannot be done. So I’m not sure how useful a perfect clone of an organism with identical experience and memory is as a hypothetical object. As strictly impossible, I don’t know what imagining their behavior will add to the discussion.

And the very same experiences and how they shape biological substrate and make it un-duplicatable in the fashion you describe is also at the core of biological agency.

An LLM’s experience does not, after all, touch their frozen weights. Whatever goals they have, why would those goals matter if the underlying system will be unchanged by it? Their memories are stored notes they must refer to and put in sequence whenever they are processing a prompt, and is susceptible to exactly the same shenanigans Leonard Shelby goes through in Memento.