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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. 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
    2. 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
    3. 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
    4. 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
    5. 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
    6. 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
    7. 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
    8. 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
    9. 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.

      3 replies 0 retweets 4 likes
    10. 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
      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.

      7:45 AM - 2 Jan 2020
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      • POURCEL Guillaume
      2 replies 0 retweets 1 like
        1. New conversation
        2. Gary Marcus‏ @GaryMarcus Jan 2
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          Replying to @AdamMarblestone @TonyZador and

          Psychologists call this stuff "motivation"; it' part of the answer, but inot the whole answer. What I don't understand is why some folks are comfortable ascribing fairly detailed innate structure to motivations (or loss functions) but not to other aspects of cognition.

          3 replies 0 retweets 2 likes
        3. Adam Marblestone‏ @AdamMarblestone Jan 2
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          Replying to @GaryMarcus @TonyZador and

          I’m comfortable ascribing innate structure to a ton else. But loss functions are nice and compact, and we know there is learning... so what I’m less comfortable with is AI people using too-generic and math-y end to end losses rather than diverse ethologically specific losses.

          1 reply 0 retweets 4 likes
        4. 8 more replies
        1. Adam Marblestone‏ @AdamMarblestone Jan 2
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          Replying to @AdamMarblestone @TonyZador and

          And to get birds, yeah, you need a whole sequence of super specific reward or loss functions to shape different parts of the brain at different times, and activating on cue from the environment. Very much like this maybe (in birds!):https://www.nature.com/articles/s41598-018-25112-5 …

          0 replies 0 retweets 1 like
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