We can't even decide how much, and of what, would constitute a person. If like you said, the best AI right now is just a portion of the language processing part of our brain, it still can be sentient.
Not that I think LLMs are anything close to people or AGI. But the fact is that we can't concretely and absolutely refute AI sentience based on our current knowledge. The technology deserves respect and deep thoughts instead of dismissing it as "glorified autocomplete". Nature needed billions of years to go from inert chemicals to sentience. We went from vacuum tubes to something resembling it in less than a century. Where can it go in the next century?
This is practically the same conversation many places are having about abortion. The difference is that we know a human egg eventually becomes a human, we just can’t agree when.
"What is the distribution of human consciousness?"
"How do the most conscious virtual models compare to the least conscious humans?"
"If the most conscious virtual models are more conscious than the least conscious humans... should the virtual models have more rights? Should the humans have fewer? A mix of both?"
At no objective point. Rights and ethics are a social constract, and as such can be given (and taken away from) some elite, a few people, most people, or even rocks and lizzards.
Yes, unless we stretch the definition of conscious most people use beyond recognition.
At that point, though, it will be so remote from what we use the term for, that it could just be any random term, like doskoulard!
"Can we even refutre that a rock is doskoulard?"
The rock is neither "aware" nor "responsive". It just stands there. It's a non-reactive set of minerals, lacking not just any capacity to react, but also life.
Though that's overthinking it. Sometimes you don't need decicated testing equipment to know something, just common sense.
Common sense is valuable, but it has a mixed scientific track record.
You can always find small exceptions to everything. But you know what I mean.
Except if your point is that, like the vegetative victims, the rock's brain is still alive.
To me, it seems more like we've frozen the language processing portion of a brain, put it on a lab table, and now everyone gets to take turns poking it with a cattle prod.