Simple circuits can create complex behaviors

(aatishb.com)

136 points | by aatish 4 days ago

14 comments

  • Animats 5 minutes ago
    The ancestor is not Braitenberg. It's Grey Walter's turtles.

    In 1948, W. Grey Walter built two simple robots that could sense light and touch.[1] Much complex behavior emerged. That's where this idea started.

    Watch the video.[2] It's very impressive for 1948 and tube technology. If you've seen an original Roomba, you've seen a similar level of intelligence. Rod Brooks went down this road. But it didn't go very far. There are severe limits to purely reactive robotics. It doesn't work well for anything that moves fast enough that inertia matters.

    [1] https://en.wikipedia.org/wiki/Elmer_and_Elsie_(robots)

    [2] https://www.youtube.com/watch?v=lLULRlmXkKo

  • tancop 2 hours ago
    > If you saw creatures behaving like this in the wild, you might attribute some rudimentary intelligence to them.

    > But we’ve just shown you how this apparent intelligence arises from the bottom up, with just four neurons and two connections. There’s no magic here. In this view, behavior emerges from neural circuits.

    Isn't the conclusion here that very simple behaviors like the sparks are intelligent? I would say even a single neuron has some tiny amount of intelligence, and what the author means by "no magic" and "emergent behavior" is just a different perspective that minimizes it.

    • WarmWash 2 hours ago
      Intelligence is an arbitrary term humans assign to stuff subjectively.

      Take out the "human" and it's all just algos on a scale of complexity.

      • pkoird 2 hours ago
        Agreed. Take human out and any system capable of doing an if-else is intelligent to a certain degree.
        • RandomLensman 2 hours ago
          If basically everything is intelligent (e.g., incl. rather simple chemistry), does that word mean much then/is it a useful term?
          • IshKebab 1 hour ago
            Yes, words that label parts of continua are useful, even if they don't have well defined boundaries.

            Kind of amazing how simple that fact is and how many arguments are caused by people not realising that it's true.

            Here are some examples: town, artery, yellow, loud, tall, kind, woman, road...

            Honestly it's hard to think of words that do not exist on a continuum. The exceptions are mostly low level maths/physics things.

            • RandomLensman 1 hour ago
              Sorry, but if everything is intelligent then why is a word for it even needed like it is used today - stating that intelligence is an intrinsic property of matter, moves the discussion quite a bit, I think, as it changes what we denote there.

              Unlike "artery" which certainly isn't every blood vessel or "yellow" that isn't every color.

              • kylecazar 1 hour ago
                "Intelligence" = vessel or color in your example

                There are words that distinguish between types/degrees of intelligence. Basal/proto intelligence applies to cells and bacteria. Somatic intelligence is a level higher at tissue. Superintelligence you've no doubt heard of.

                It's true that "intelligence" is general/umbrella and doesn't have much meaning, but more specific terms do exist.

                • RandomLensman 1 hour ago
                  So intelligence is an intrinsic property of matter then? It's not a mainstream view now, but who knows.
                  • robotresearcher 9 minutes ago
                    No, intelligence is a description of behavior, not stuff.

                    As a crisp example: a newly dead person is almost exactly the same stuff as an alive person, but has no intelligence at all. Not a little less, as the difference in stuff would suggest.

                  • kylecazar 1 hour ago
                    I personally don't think it's an intrinsic property of all matter, but an emergent one with interaction specifically. Systems have intelligence, not particles, and to be a system, you must have constituent parts (which may not be intelligent themselves). That's why they say it 'emerges'.

                    A cell is a system, as is a virus, a tucan, a human and an LLM. They exhibit different levels and brands of intelligence, hence continuum.

                    That's the popular view among scientists/philosophers/my podcasters, at least, and it makes sense to me!

                    • RandomLensman 1 hour ago
                      Yes, I think, emergence is the currently prevailing view.

                      I was thinking more that something like this:

                      > any system capable of doing an if-else is intelligent to a certain degree

                      could probably be getting quite broad in terms of things covered (chemistry, physics), hence making it much more intrinsic.

              • AndrewKemendo 1 hour ago
                Most human societies claim dominance over “everything else” aka “nature” and in order to do that you need a reason “humans” are different from “nature”
                • RandomLensman 1 hour ago
                  Maybe, but making intelligence an intrinsic property of matter feels like a bold step.
                  • pixl97 30 minutes ago
                    There are other bolder things I've seen recently that are somewhat interesting.

                    Michael Levin and a few other biologists are wondering if certain combinations of matter are tapping into platonic maths that they use for 'intelligence compute'.

                  • AndrewKemendo 56 minutes ago
                    I mean Roger Penrose proposes that consciousness is inside the waveform collapse so…

                    Many definitions of intelligence and ultimately consciousness rely on fanciful ideas and complex theories

      • verdverm 46 minutes ago
        psychology also has favored behavioralism for a long time, such that if something displays the behavior, it is likely the same thing as that which we believe/know has the behavior already

        It's come to be foundational to much of western thinking beyond psychology

        A topical example is a portion of society believing that the top Ai researchers should be setting domestic political and economic policy, foreign affairs, and chem/bio weapon controls... instead of the experts in those fields. We extrapolate their above average capabilities in building Ai into an artificial general intelligence where it is not due.

  • georgestrakhov 3 hours ago
    Check out Valentino Braitenberg's vehicles. It's one of my favourite books ever.
    • baruz 1 hour ago
      A K Dewdney did a quick sketch of the early chapters of Braitenberg’s book in his Computer Recreations column in _Scientific American_ in the late 1980s.
    • mikeegg1 3 hours ago
      I came here to mention that book.
  • TehCorwiz 2 hours ago
    Growing up I tinkered with BEAM robotics. It's a philosophy of design that begins with these types of very simple reactive circuits usually from scavenged parts. It's nice to see someone break down the effect of different variables in the design.

    https://en.wikipedia.org/wiki/BEAM_robotics

  • adamlrhodes 56 minutes ago
    Hey, just read through the interactive blog post and found it really informative and fun! Thanks for sharing, I come from comp sci undergrad background and am trying to learn more about AI/Neuroscience now, and resources like these make it much easier to learn!
    • senthil_rajasek 43 minutes ago
      The article mentions the book by Valentino Braitenberg as the source of inspiration.

      " The sparks that we assembled in this article are based on a series of thought experiments by the neuroscientist Valentino Braitenberg described in his delightfully quirky 1984 book Vehicles: Experiments in Synthetic Psychology."

      • adamlrhodes 38 minutes ago
        Thanks for mentioning that, I'm definitely going to check that out next!
  • bob1029 3 hours ago
  • dvh 1 hour ago
  • rileymat2 1 hour ago
    > Aatish is a science journalist with a Ph.D. in physics. Previously, he was a graphics editor at The New York Times. Follow Aatish’s work for more visually-immersive interactive explanations about science.

    That is excellent work and well demonstrated by the article.

  • vatsachak 2 hours ago
    A similar mechanism is how lactobacillus actually find food even though their motor propels them in random directions.

    They have sensors for the concentration of food and basically stop moving when it's good enough and start when it's low.

  • sheepseb 2 hours ago
    Read this and instantly though about Elmer and Elsie, https://en.wikipedia.org/wiki/Elmer_and_Elsie_(robots)
  • patrick_rtk 35 minutes ago
    wow very nice article and animation. we can see some behaviors in the wild life. very interesting.
  • thenthenthen 4 hours ago
    Best thing is, you can physically build this with a few discrete analog components! Search terms: light-bot, or light following robot. You can try to create swarms adding a light to the rear end of your robot
  • Borrible 3 hours ago
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  • SadErn 3 hours ago
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