I know deep AI is the new hotness, but we still don't know whether it will work. Personally, I think expert systems died too soon, and we're going to see a resurgence.

I wouldn't be surprised if expert systems + operant conditioning don't end up being better at general intelligence than all of the fancier machine learning. That's a very old fashioned view, but I'm an old fashioned guy. My point is just that we don't know.

Deep learning has already "worked" on many tasked and has also pushed the state of the art in a large range of fields. It's not going to solve every problem but I don't really understand what you mean by not being sure whether it "works".

When I say "work" I mean "lead to human-grade general intelligence".

Of course for niche intelligence AI has been working forever.