It is theoretically possible, after all, to simulate a human brain at a subatomic level. Sure, the complexity is absurd and interface required to measure it seems far fetched, but technically there's no restriction.
Because of this I believe what we know as "thought" or consciousness exists in the space between the physical world. It's just a way to represent the world around us, with the ability to reference the past and systems to predict the future.
LLMs to me are like a simplified version thats stretched across the domain of active memory. The "thought" process is the same, an active state (current token) guided by the past state (previous tokens).
I think the next step is to reduce what a token is. Right now they are vectors that are linked to words. If instead of words we fed it direct video and audio, and a way to translate the raw data into something resembling the information passed from our eyes and ears in real time, and train it like a child learns from its parents, it's hard to draw the line on where thought begins.
It's an interesting experiment, but I still consider it anti-human.
In the future, when we have "robot" rights for robots that identify as humans, you'll find me on the side of "they aren't a real human". We'll be called bigots, and I'm okay with that.