How would one be able to prove this? Nobody knows how we think, yet.
All one can say is that what GPT-4 outputs could plausible fool another human into believing another human wrote it. But that's exactly what it's designed to do, so what's interesting about that?
> If you concede that our brain is "simulatable",
It could be. Maybe. It might be that's what the universe is doing right now. Does it matter?
We're talking about writing an emulator on a Harvard-architecture computer that can fully simulate the physics and biological processes the make up a human brain. By interpreting this system in our emulator we'd be able to witness a new human being that is indistinguishable from one that isn't simulated, right?
That's not what GPT is doing. Not even close.
It turns out there's more to being human than being a register VM. Ever get punched in the face? Bleed? Fall in love? Look back on your life and decide you want to change? Write a book but never show it to anyone? Raise a child? Wonder why you dreamt about airplanes on Mars with your childhood imaginary friend? Why you hate bananas but like banana bread? Why you lie to everyone around you about how you really feel and are offended when others don't tell you the truth?
It's not so simple.