We still have no idea what mechanism causes consciousness. I bet in 25 years we'll be no closer to understanding it than we are today. I think this is a good lesson for those watching LLMs and thinking we're on the cusp of imminent AGI.
Might actually be easier to create artificial consciousness such that we can actually measure and more closely study what is happening.
The biological approach is fiendishly difficult. If we can barely understand how an LLVM is working, what chance do we have of trying to understand one by only looking at the raw electrical output few dozen transistors from a machine running one.