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Plinz's profile
Joscha Bach
Joscha Bach
Joscha Bach
@Plinz

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Joscha Bach

@Plinz

FOLLOWS YOU. Artificial Intelligence, Cognitive Architectures, Computation. The goal is integrity, not conformity.

San Francisco, CA
bach.ai
Joined April 2009

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    1. Joscha Bach‏ @Plinz 29 Dec 2017
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      The surprising fact that science works at all is a strong indication that our universe is mechanical.

      4 replies 1 retweet 18 likes
    2. Lucian Teodorescu‏ @LucT3o 29 Dec 2017
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      Replying to @Plinz

      What does “mechanical” mean? Isn’t it defined in terms of “laws of the universe”?

      1 reply 0 retweets 2 likes
    3. Joscha Bach‏ @Plinz 29 Dec 2017
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      Replying to @LucT3o

      According to my current best understanding it means that it can be implemented on a Turing machine.

      3 replies 0 retweets 0 likes
    4. Lucian Teodorescu‏ @LucT3o 29 Dec 2017
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      Replying to @Plinz

      Interesting point of view! Never have thought of it like that. Does this entail the universe is deterministic?

      1 reply 0 retweets 0 likes
    5. Joscha Bach‏ @Plinz 29 Dec 2017
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      Replying to @LucT3o

      You can create true randomness by including an incompressible bitstring into a deterministic computation. However, the unpredictability of local phenomena in our universe probably can be easier explained by non-locality.

      2 replies 0 retweets 0 likes
    6. Joscha Bach‏ @Plinz 29 Dec 2017
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      Replying to @Plinz @LucT3o

      In other words, it is trivial to produce fully unpredictable results from a deterministic machine. (It is also possible to recover deterministic behavior down to an arbitrarily small epsilon from a probabilistic machine, which is how our computers work.)

      1 reply 0 retweets 1 like
    7. Lucian Teodorescu‏ @LucT3o 29 Dec 2017
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      Replying to @Plinz

      Ok, so the fundamentals of physics are deterministic, but they produce apparently random behavior. I like this; proving it is the problem.

      1 reply 0 retweets 0 likes
      Joscha Bach‏ @Plinz 29 Dec 2017
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      Replying to @LucT3o

      I don't see how this is a problem? From within a system, the best truth is never the ground truth, but the set of theories that can explain all observations. There does not need to be any proof beyond showing that it can work.

      3:43 AM - 29 Dec 2017
      1 reply 0 retweets 0 likes
        1. New conversation
        2. Lucian Teodorescu‏ @LucT3o 29 Dec 2017
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          Replying to @Plinz

          The problem I’m referring to is Quantum Mechanics, denying determinism. Empirically QM is right, but it doesn’t mean absolute truth.

          1 reply 0 retweets 0 likes
        3. onnlucky 🍀‏ @onnlucky 29 Dec 2017
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          Replying to @LucT3o @Plinz

          You are correct to point out it is not (only) an epistemic uncertainty. But it might still be computable from the outside, and be uncertain from our perspective. Notice if the universe is computable, its time is not our time, ours is relative.

          0 replies 0 retweets 1 like
        4. End of conversation

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