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michael_nielsen's profile
michael_nielsen
michael_nielsen
michael_nielsen
@michael_nielsen

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michael_nielsen

@michael_nielsen

Searching for the numinous. Co-purveyor of https://quantum.country/ 

San Francisco, CA
michaelnielsen.org
Joined July 2008

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    michael_nielsen‏ @michael_nielsen 7 Apr 2017
    • Report Tweet

    In Geoff Hinton's Reddit AMA he makes a striking point about how underconstrained our brains are: https://www.reddit.com/r/MachineLearning/comments/2lmo0l/ama_geoffrey_hinton/clyjogf/ …pic.twitter.com/WmxWFl9Qbq

    12:48 PM - 7 Apr 2017
    • 123 Retweets
    • 255 Likes
    • Mo Glorious Leader Mitko myui Ljubomir Josifovski Fahd Alhazmi James Ellis Jackson Mohsenin Eliezer Silva Zornitsa Kostadinova
    9 replies 123 retweets 255 likes
      1. New conversation
      2. François Chollet‏Verified account @fchollet 7 Apr 2017
        • Report Tweet
        Replying to @michael_nielsen

        Unclear that the number of synapses is a measure of the number of free parameters in the brain. Real number likely orders of mag smaller.

        3 replies 3 retweets 17 likes
      3. Misha Denil‏ @notmisha 7 Apr 2017
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        Replying to @fchollet @michael_nielsen

        Also unclear why seconds is a meaningful unit of time to compare with.

        2 replies 0 retweets 7 likes
      4. 2 more replies
      1. New conversation
      2. Mike Tyka‏ @mtyka 7 Apr 2017
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        Replying to @michael_nielsen

        Hmmm but not if every second we take in > 10^5 bits (e.g. ~32x32px 8bit image) of information through our highly parallel senses, right ?

        2 replies 0 retweets 10 likes
      3. Blake Richards‏ @tyrell_turing 7 Apr 2017
        • Report Tweet
        Replying to @mtyka @michael_nielsen

        this is the real problem with Geoff's statement

        1 reply 0 retweets 1 like
      4. 1 more reply
      1. Adam J Calhoun‏Verified account @neuroecology 7 Apr 2017
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        Replying to @michael_nielsen

        This is assuming that the synaptic weights should be uncorrelated, aren't there for homeostatic reasons, don't have genetic info, etc

        0 replies 0 retweets 8 likes
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      1. New conversation
      2. Grzegorz Chrupała  🇪🇺‏ @gchrupala 7 Apr 2017
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        Replying to @michael_nielsen

        assuming the brain is a blank slate

        1 reply 0 retweets 1 like
      3. Boris Reuderink‏ @breuderink 8 Apr 2017
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        Replying to @gchrupala @michael_nielsen

        And that all parameters need to be determined...

        0 replies 0 retweets 2 likes
      4. End of conversation
      1. New conversation
      2. Vincent Danos‏ @vee3my 8 Apr 2017
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        Replying to @michael_nielsen

        add to that the fact that the brain has to be grown - any NN model where neurons and parameters grow while ingesting data?

        1 reply 0 retweets 2 likes
      3. Vincent Danos‏ @vee3my 8 Apr 2017
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        Replying to @vee3my @michael_nielsen

        also there are structured and evolving waves of activity in the pre-birth retinal system of mice; this is "not even unsupervised" learning

        0 replies 0 retweets 0 likes
      4. End of conversation
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