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AdamMarblestone's profile
Adam Marblestone
Adam Marblestone
Adam Marblestone
@AdamMarblestone

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Adam Marblestone

@AdamMarblestone

Technologist, Scientist

adammarblestone.org
Joined February 2009

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    1. Kevin Mitchell‏ @WiringTheBrain Jan 1
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      Just watched this AI DEBATE with Yoshua Bengio and @GaryMarcus https://youtu.be/EeqwFjqFvJA  and was inspired to write a blogpost about innate priors and how much information is encoded in the genome (coming soon...)

      3 replies 17 retweets 119 likes
      Show this thread
    2. Tony Zador‏ @TonyZador Jan 1
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      Replying to @WiringTheBrain @GaryMarcus

      Chimps and humans differ by <5% of their genomes, so that the instructions for specifying a human vs chimp brain would be 0.05 * (1.5e9 bytes / genome) = 75 MB. But only a fraction of that is under selection. So maybe the diffs would fit on an old school 360K floppy disk?

      11 replies 4 retweets 39 likes
    3. Mark Cannon‏ @markcannon5 Jan 1
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      Replying to @TonyZador @hardmaru and

      Thinking about differences in terms of building instructions is fruitless surely. I could make a hugely complex structure with only a few lines of code and dont get me started on bootstrapping which adds even more to the emergent complexity.

      2 replies 0 retweets 7 likes
    4. Kevin Mitchell‏ @WiringTheBrain Jan 2
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      Replying to @markcannon5 @TonyZador and

      What do you mean by bootstrapping in this context?

      1 reply 0 retweets 1 like
    5. Mark Cannon‏ @markcannon5 Jan 2
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      Replying to @WiringTheBrain @TonyZador and

      How code can build on code / how the architecture impact of learned intelligence impacts future architectural impacts. We start with the same wiring but early experiences change the trajectory for future architectural changes.

      1 reply 0 retweets 3 likes
    6. Kevin Mitchell‏ @WiringTheBrain Jan 2
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      Replying to @markcannon5 @TonyZador and

      Okay, thanks. That's really the central question we're after here - how much prior knowledge is prewired from genomic info and how much is learned

      1 reply 0 retweets 4 likes
    7. Mark Cannon‏ @markcannon5 Jan 2
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      Replying to @WiringTheBrain @TonyZador and

      No problem. To me it's purely information that builds a neural architecture that facilitates intelligence creation. Based on experience etc.

      1 reply 0 retweets 1 like
    8. Kevin Mitchell‏ @WiringTheBrain Jan 2
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      Replying to @markcannon5 @TonyZador and

      That's the position Bengio and @ylecun are arguing for - as few priors as possible and mainly for meta-learning rather than specific knowledge. @GaryMarcus argues for more prior knowledge pre-wired in from the genome

      2 replies 4 retweets 10 likes
    9. Free Recall‏ @freerecall Jan 2
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      Replying to @WiringTheBrain @markcannon5 and

      Free Recall Retweeted Free Recall

      But does the genome really encode "knowledge?" The Nativists assume, yet never explain, how knowledge is directly encoded in the genome. This preformist assumption contradicts the self-organized and pattern-forming dynamics of real developmental systems:https://twitter.com/freerecall/status/1204039449371242497?s=19 …

      Free Recall added,

      Free Recall @freerecall
      What are the origins of cognition? Do infants possess innate knowledge? Or is knowledge actively constructed over development? Smith (1999) on the necessity of understanding the developmental process to explain the origins of knowledge: https://onlinelibrary.wiley.com/doi/abs/10.1111/1467-7687.00062 … pic.twitter.com/fAj2m5z5VV
      1 reply 5 retweets 7 likes
    10. Tony Zador‏ @TonyZador Jan 2
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      Replying to @freerecall @WiringTheBrain and

      it's a great question. In some cases, the genome encodes pretty specific stuff. Dams beavers build are hardwired And if a mouse that builds a short burrow is raised by long-burrowing moms, it still builds short burrows. Cool stuff from Hoekstra:https://hoekstra.oeb.harvard.edu/ 

      6 replies 4 retweets 24 likes
      Adam Marblestone‏ @AdamMarblestone Jan 2
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      Replying to @TonyZador @freerecall and

      How much of this can be via genome-encoded reward fxn? For mouse who likes short borrows “ugh, I hate wide open spaces” & “mmm, I’ve burrowed a just bit and now I’m so satisfied”. Vs. pre-coded program of actions. If so, still lots of learning involved, just w/ specific cost fxn.

      7:17 AM - 2 Jan 2020
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      • Michael Hendricks Alexia Jolicoeur-Martineau Alexander Huth Anders Sandberg
      3 replies 0 retweets 4 likes
        1. New conversation
        2. Tony Zador‏ @TonyZador Jan 2
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          Replying to @AdamMarblestone @freerecall and

          i dont understand this distinction. Hopi's expts show that genes determine whether the burrow is short or long. One mech to encode this in the genome involves a reward function on the length of the burrow (and a bit more). probably need more than "stop now" for birdspic.twitter.com/WspWDX3iAM

          2 replies 0 retweets 1 like
        3. Adam Marblestone‏ @AdamMarblestone Jan 2
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          Replying to @TonyZador @freerecall and

          It doesn’t contradict the genomic encoding at all. But it puts a different emphasis as far as the need to *additionally* have a quite powerful RL system operating, to get the right behavior. It suggests a different AI emphasis: meta learning or evolving very specific reward fxns.

          2 replies 0 retweets 1 like
        4. 10 more replies
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        2. Kevin Mitchell‏ @WiringTheBrain Jan 2
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          Replying to @AdamMarblestone @TonyZador and

          Well, that's the question! We know many of those behaviors can be pre-wired - we don't know how!

          2 replies 0 retweets 5 likes
        3. Free Recall‏ @freerecall Jan 2
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          Replying to @WiringTheBrain @AdamMarblestone and

          I don't know what @GaryMarcus means by "pre-wired:" early in development? Species-typical? Universal?

          1 reply 0 retweets 0 likes
        4. 2 more replies
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        2. Michael Hendricks‏ @MHendr1cks Jan 2
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          Replying to @AdamMarblestone @TonyZador and

          It has to be the former, yes? Otherwise the demand on the genome is impossible. And of course an allelic difference is rarely specific to one behaviour/trait, or has the same relationship to behavioural differences in all genetic contexts.

          1 reply 0 retweets 0 likes
        3. Michael Hendricks‏ @MHendr1cks Jan 2
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          Replying to @MHendr1cks @AdamMarblestone and

          My hand wavy guess would be burrowing is a hardwired synaptic motor program and state-dependent modulatory systems that influence a range of covarying behaviours tell you when to start and stop.

          0 replies 0 retweets 0 likes
        4. End of conversation

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