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AI winter is well on its way

blog.piekniewski.info

81–90 of 518 posts

Re: AI winter is well on its way

#81
This is a deep, significant post (pardon pun etc).

The author is clearly informed and takes a strong, historical view of the situation. Looking at what the really smart people who brought us this innovation have said and done lately is a good start imo (just one datum of course, but there are others in this interesting survey).

Deepmind hasn't shown anything breathtaking since their Alpha Go zero.

Another thing to consider about Alpha Go and Alpha Go Zero is the vast, vast amount of computing firepower that this application mobilized. While it was often repeated that ordinary Go program weren't making progress, this wasn't true - the best, amateur programs had gotten to about 2 Dan amateur using Makov Tree Search. Alpha Go added CNNs for it's weighting function and petabytes of power for it's process and got effectiveness up to best in the world, 9 Dan professional, (maybe 11 Dan amateur for pure comparison). [1]

Alpha Go Zero was supposedly even more powerful, learned without human intervention. BUT it cost petabytes and petabytes of flops, expensive enough that they released a total of ten or twenty Alpha Go Zero game to the world, labeled "A great gift".

The author convenniently reproduces the chart of power versus results. Look at it, consider it. Consider the chart in the context of Moore's Law retreating. The problems of Alpha Zero generalizes as described in the article.

The author could also have dived into the troubling question as of "AI as ordinary computer application" (what does testing, debugging, interface design, etc mean when the app is automatically generated in an ad-hoc fashion) or "explainability". But when you can paint a troubling picture without these gnawing problems appearing, you've done well.

[1] https://en.wikipedia.org/wiki/Go_ranks_and_ratings

Re: AI winter is well on its way

#82
No, but wait! We're just on the verge of replacing doctors! ;-)

There's still a lot of space for the improvement of "curve-fitting" AI in the workplace. The potential of existing tech is far from being thoroughly exploited right now. I believe the next big improvements will come more from better integration in the workplace (or road system) than new scientific advances, so that might seem less sexy. But I also believe this will be a sufficient impetus to drive the field forward for the years to come.

Re: AI winter is well on its way

#83

The argument is that self-driving won't work because Uber and Tesla had well-publicized crashes. But I don't see how this tells us anything about other, apparently more cautious companies like Waymo. There seem to be significant differences in technology. More generally, machine learning is a broad area and there's no reason to believe that different applications of it will all succeed or all fail for similar reasons…

Seriously. Frankly, based on Uber's culture I would have been surprised if they didn't kill at least one person with their self-driving efforts. It's a total non-data point. The fact that Uber got as far as they did without killing anyone is strong evidence that the problem is tractable.

As for Tesla - Tesla isn't even trying to make proper self-driving cars. Tesla's goal has always been assisted driving. However you feel about that, it's really not relevant to the success or failure of self-driving cars.

OP can't possibly have been ignorant of the fact that Waymo is the clear leader here with a substantial head start, and a proven record (and an actual fleet of self driving cars now on the road), and yet he chose not to mention it. That really undermines his credibility for me - he seems clearly more interested in making his point than in accurately engaging with reality.

Re: AI winter is well on its way

#84

Earlier quoted context omitted.

When I saw the Google demo of a CNN using video to split a single audio stream of two guys talking over each other, I became a believer.

Hey, a small advice for the future: never build your belief entirely on a youtube video of a demo. In fact, never build your belief based on a demo, period. This is notorious with current technology: you can demonstrate anything. A few years ago Tesla demonstrated a driverless car. And what? Nothing. Absolutely nothing. I'm willing to believe stuff I can test myself at home. If it works there, it likely actually work…

Your advice would be a lot more convincing if you had a youtube video of a demo to come with it. Just saying. :P

Re: AI winter is well on its way

#85
I've always understood the claim that deep learning scales to be a claim about deployment and use of trained models, not about training. The whole point is that you can invest (substantial) resources upfront to train a sufficiently good model, but then the results of that initial investment can be used with very small marginal costs.

OP's argument on this front seems disingenous to me.

His focus on Uber and Tesla (while not even mentioning Waymo) is also a truly strange omission. Uber's practices and culture have historically been so toxic that their failures here are truly irrelevant, and Tesla isn't even in the business of making actual self driving cars.

I'm the first to argue that right now AI is overhyped, but this is just sensationalist garbage from the other end of the spectrum.

Re: AI winter is well on its way

#86

Earlier quoted context omitted.

Thanks for that, that is essentially my point. Agree it is not very rigorous, but it gets the idea across. By scalable we'd typically think "you throw more gpu's at it and it works better by some measure". Deep learning does that only in extremely specific domains, e.g. games and self play as in alpha go. For majority of other applications it is architecture bound or data bound. You can't throw more layers, more basi…

More compute -> more precision is just one field's definition of scalable... Saying that DNNs can't get better just by adding GPUs is like complaining that an apple isn't very orange. To generalize notions of scaling, you need to look at the economics of consumed resources and generated utility, and you haven't begun to make the argument that data acquisition and PhD student time hasn't created ROI, or that ROI on th…

OK, the definition of scalable is crucial here and it causes lots of trouble (this is also response to several other posts so forgive me if I don't address your points exactly).

Let me try once again: an algorithm is scalable if it can process bigger instances by adding more compute power.

E.g. I take a small perceptron and train it on pentium 100, and then take a perceptron with 10x parameters on Core I7 and get better output by some monotonic function of increase in instance size (it is typically a sub linear function but it is OK as long as it is not logarithmic).

DL does not have that property. It requires modifying the algorithm, modifying the task at hand and so on. And it is not that it requires some tiny tweaking. It requires quite a bit of tweaking. I mean if you need a scientific paper to make a bigger instance of your algorithm this algorithm is not scalable.

What many people here are talking about is whether an instance of the algorithm can be created (by a great human effort) in a very specific domain to saturate a given large compute resource. And yes, in that sense deep learning can show some success in very limited domains. Domains where there happens to be a boatload of data, particularly labeled data.

But you see there is a subtle difference here, similar in some sense to difference between Amdahl's law and Gustafson's law (though not literal).

The way many people (including investors) understand deep learning is that: you build a model A, show it a bunch of pictures and it understands something out of them. Then you buy 10x more GPU's, build model B that is 10x bigger, show it those same pictures and it understands 10x more from them. Look I, and many people here understand this is totally naive. But believe me, I talked to many people with big $ that have exactly that level of understanding.

Re: AI winter is well on its way

#87

This is a deep, significant post (pardon pun etc). The author is clearly informed and takes a strong, historical view of the situation. Looking at what the really smart people who brought us this innovation have said and done lately is a good start imo (just one datum of course, but there are others in this interesting survey). Deepmind hasn't shown anything breathtaking since their Alpha Go zero. Another thing to co…

I'm sure the same could be said for early computer graphics before the GPU race. You don't need Moore's Law to make machine learning fast, you can also do it with hardware tailored to the task. Look at Google's TPUs for an example of this.

If you want an idea of where machine learning is in the scheme of things, the best thing to do is listen to the experts. _None_ of them have promised wild general intelligence any time soon. All of them have said "this is just the beginning, it's a long process." Science is incremental and machine learning is no different in that regard.

You'll continue to see incremental progress in the field, with occasional demonstrations and applications that make you go "wow". But most of the advances will be of interest to academics, not the general public. That in no way makes them less valuable.

The field of ML/AI produces useful technologies with many real applications. Funding for this basic science isn't going away. The media will eventually tire of the AI hype once the "wow" factor of these new technologies wears off. Maybe the goal posts will move again and suddenly all the current technology won't be called "AI" anymore, but it will still be funded and the science will still advance.

It's not the exciting prediction you were looking for I'm sure, but a boring realistic one.

Re: AI winter is well on its way

#88

A different take by Google’s cofounder, Sergey Brin, in his most recent Founders’ Letter to investors: “The new spring in artificial intelligence is the most significant development in computing in my lifetime.” He listed many examples below the quote. “understand images in Google Photos; enable Waymo cars to recognize and distinguish objects safely; significantly improve sound and camera quality in our hardware; und…

Hi, author here: Well first off: letters to investors are among the most biased pieces of writing in existence. Second: I'm not saying connectionism did not succeed in many areas! I'm a connectionist by heart! I love connectionism! But that being said there is disconnect between the expectations and reality. And it is huge. And it is particularly visible in autonomous driving. And it is not limited to media or CEO's,…

How can something be biased when it's listing facts?

Those are actual features that are available today to anyone, that were made possible by AI. Do you think it would be possible to type "pictures of me at the beach with my dog" without AI in such as short time frame? Or to have cars that drive themselves without a driver? These are concrete benefits of machine learning, I don't understand how that's biased.

Re: AI winter is well on its way

#89

Earlier quoted context omitted.

Thanks for that, that is essentially my point. Agree it is not very rigorous, but it gets the idea across. By scalable we'd typically think "you throw more gpu's at it and it works better by some measure". Deep learning does that only in extremely specific domains, e.g. games and self play as in alpha go. For majority of other applications it is architecture bound or data bound. You can't throw more layers, more basi…

More compute -> more precision is just one field's definition of scalable... Saying that DNNs can't get better just by adding GPUs is like complaining that an apple isn't very orange. To generalize notions of scaling, you need to look at the economics of consumed resources and generated utility, and you haven't begun to make the argument that data acquisition and PhD student time hasn't created ROI, or that ROI on th…

You’re arguing around the point here.

Almost all reasearch domains live on a log curve; a little bit gets you a lot to start with, but eventually you exhaust the easy solutions and a lot of work gets you very little improvement.

You’re arguing we haven’t reached the plateau at the top yet, but you’ve offered no meaningful evidence that is the case.

There are real world indicators that we are reaching diminishing returns for investment in compute and research now.

The ‘winter’ becomes a thing when it becomes apparent to investors that their financial bets are based off nothing more concrete than opinions like yours, when they don’t work out.

Are we there yet? Not sure, myself, I think we can get some more wins from machine generated architectures... but I can’t see any indication that the ‘winter’ isn’t coming sooner or later.

Investment is massively outstripping returns right now... we’ll just have to see if that calms down gradually, or pops suddenly.

History does not have a good story to tell about responsible investors behaving in a reasonable manner and avoiding crashes.

Re: AI winter is well on its way

#90

Earlier quoted context omitted.

When I saw the Google demo of a CNN using video to split a single audio stream of two guys talking over each other, I became a believer.

Hey, a small advice for the future: never build your belief entirely on a youtube video of a demo. In fact, never build your belief based on a demo, period. This is notorious with current technology: you can demonstrate anything. A few years ago Tesla demonstrated a driverless car. And what? Nothing. Absolutely nothing. I'm willing to believe stuff I can test myself at home. If it works there, it likely actually work…

You can't test most of high end physics at home. I hope that doesn't mean you don't believe it!
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