if you put the exact same person in the exact same situation (a perfect to the molecular level) they will behave differently.

I don’t consider that relevant to sentience. Structurally, biological systems change based on inputs. LLMs cannot. I consider that plasticity to be a prerequisite to sentience. Others may not.

We will undoubtedly see systems that can incorporate some kind of learning and mutability into LLMs. Re-evaluating after that would make sense.