this post was submitted on 22 Jul 2023
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I would agree that we are also very complicated statistical models, there's nothing magical going on in the human brain either, just physics which as far as we know is math that we could figure out eventually. It's a massively huge order of magnitude leap in complexity from current machine learning models to human brains, but that's not to say that the only way we'll get true artificial intelligence is by accurately simulating a human brain, I'd guess that we'll have something that's unambiguously intelligent by any definition well before we're capable of that. It'll be a different approach from the human brain and may think and act in alien or unusual ways, but that can still count.
Where we are now, though, there's really no reason to expect true intelligence to emerge from what we're currently doing. It's a bit like training a mouse to navigate a maze and then wondering whether maybe the mouse is now also capable of helping you navigate your cross-country road trip. "Well, you don't know how it's doing it, maybe it has acquired general navigation intelligence!" It can't be disproven, I guess, but there's no reason to think that it picked up any of those skills because it wasn't trained to do any of that, and although it's maybe a superintelligent mouse packing a ton of brainpower into a tiny little brain, all our experience with mice would indicate that their brains aren't big enough or capable of that regardless of how much you trained them. Once we've bred, uh, mice with brains the size of a football, maybe, but not these tiny little mice.
So I was thinking that that's about all that needs to be discussed, but I do actually have one thing to add. It sounds like you are just fundamentally less impressed with language than me. I wouldn't buy any hype about a maze-navigating neural net, but I do buy it (with space for doubt) about a natural language AI. I literally thought "this is 90% of the GAI problem solved, it just needs something for that last 10%" the first time I played with a transformer, and I think it was GPT-2. That might sound lame now but it was just such a fundamental advance on what was around before.
Time will tell I guess if it makes me a sucker like some consumers of past chatbots, or if there is something fundamentally different this time.
I hope I don't come across as too cynical about it :) It's pretty amazing, and the things these things can do in, what, a few gigabytes of weights and a beefy GPU are many, many times better than I would've expected if you had outlined the approach for me 2 years ago. But there's also a long history of GAI being just around the corner, and we do keep turning corners and making useful progress, but it's always still a ways off after each leap. I remember some people thinking that chess was the pinnacle of human intelligence, requiring creativity and logic to succeed, and when computers blew past humans at chess, it became clear that no, that's still impressive but you can get good at chess without really getting good at anything else.
It might be possible for an ML model to assemble itself into general intelligence based solely on being fed words like we're doing, it does seem like the data going in contains enough to do that, but getting that last 10% is going to be hard, each percentage point much harder than the last, and it's going to require more rigorous training to stop them from skating by with responses that merely come close when things get technical or precise. I'd expect that we need more breakthroughs in tools or techniques to close that gap.
It's also important to remember that as humans, we're inclined to read consciousness and intent into everything, which is why pretty much every pantheon of gods includes one for thunder and lightning. Chatbots sound human enough that they cross the threshold for peoples' brains to start gliding over inaccuracies or strange thinking or phrasing, and we also unconsciously help our conversation partner by clarifying or rephrasing things if the other side doesn't seem to be understanding. I suppose this is less true now that they're giving longer responses and remaining coherent, but especially early on, the human was doing more work than they realized keeping the conversation on the rails, and once you started seeing that it removed a bit of the magic. Chatbots are holding their own better now but I think they still get more benefit of the doubt than we realize we're giving them.