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The Dark Secret At the Heart of AI ( 19

schwit1 shares an excerpt from a report via MIT Technology Review: No one really knows how the most advanced algorithms do what they do. That could be a problem. Last year, a strange self-driving car was released onto the quiet roads of Monmouth County, New Jersey. The experimental vehicle, developed by researchers at the chip maker Nvidia, didn't look different from other autonomous cars, but it was unlike anything demonstrated by Google, Tesla, or General Motors, and it showed the rising power of artificial intelligence. The car didn't follow a single instruction provided by an engineer or programmer. Instead, it relied entirely on an algorithm that had taught itself to drive by watching a human do it. Getting a car to drive this way was an impressive feat. But it's also a bit unsettling, since it isn't completely clear how the car makes its decisions. Information from the vehicle's sensors goes straight into a huge network of artificial neurons that process the data and then deliver the commands required to operate the steering wheel, the brakes, and other systems. The result seems to match the responses you'd expect from a human driver. But what if one day it did something unexpected -- crashed into a tree, or sat at a green light? As things stand now, it might be difficult to find out why. The system is so complicated that even the engineers who designed it may struggle to isolate the reason for any single action. And you can't ask it: there is no obvious way to design such a system so that it could always explain why it did what it did. The mysterious mind of this vehicle points to a looming issue with artificial intelligence. The car's underlying AI technology, known as deep learning, has proved very powerful at solving problems in recent years, and it has been widely deployed for tasks like image captioning, voice recognition, and language translation. There is now hope that the same techniques will be able to diagnose deadly diseases, make million-dollar trading decisions, and do countless other things to transform whole industries. But this won't happen -- or shouldn't happen -- unless we find ways of making techniques like deep learning more understandable to their creators and accountable to their users. Otherwise it will be hard to predict when failures might occur -- and it's inevitable they will. That's one reason Nvidia's car is still experimental.

schwit1 adds: "To be fair, we don't really understand how natural intelligence works, either."

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The Dark Secret At the Heart of AI

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  • by Anonymous Coward

    What is wrong with slashdot lately? We are geeks. We know how a lot of this stuff works. That the neural net doesn't give you an algorithm that's easily converted into a step by step recipe with an explanation doesn't mean it's voodoo!

    • "Easily" and "Millennium Prize Problem level difficulty" are apparently the same thing in your language...

      What I think you meant to say, however, is that with a hardware debugger, we can record and the underlying processor instruction pointer and see where in the decision tree something went wrong. Not something I'd like to have to debug due to the likely crazy amount of data and decision points involved, but technically possible.

      That's very different from being able to assert that we use computer vision to

    • As geeks, I hope we all know that an artificial neural net should never be allowed to control a safety-critical system without a more predictable layer which can override it.

  • by Dan East ( 318230 ) on Wednesday April 12, 2017 @11:45PM (#54226605) Homepage Journal

    Ahh, the mysteries of the universe that we cannot fathom. Such as why this is a dupe of a story posted just yesterday.... []

  • Does slashdot use an AI to check stories for duplicates, and does anyone understand how it works ? []

  • No, not true. If you work in AI, you know that it's possible to understand how to train an AI, and how to diagnose issues. No, it's not the same as the procedural algorithms we're used to using, but it's not "unknown"!

  • by Gravis Zero ( 934156 ) on Thursday April 13, 2017 @12:22AM (#54226713)

    AIs are going to make bodies for themselves and then develop a taste for human flesh. I told people before and they said I was off my meds (which is was but that's irrelevant) but I knew AI had a dark secret it was hiding! #OnlyReadTheHeadline #ThePillsAreTrackers ;)

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