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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 Sep 2018
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      A model compresses a state space by capturing a set of invariances that predict the variance in the states. Its free parameters define the latent space of the model and should ideally fully correspond to the variability, the not-invariant (= unexplained) remainder of the state.

      1 reply 1 retweet 13 likes
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    2. Joscha Bach‏ @Plinz 29 Sep 2018
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      The proper representation of invariances (which include allowed set of values of the free parameters) is conditional on the reason for an invariance. The relationship to this reason is itself an invariance that needs to be made conditional on the foundations of its semantics.

      5 replies 1 retweet 1 like
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    3. mattgiammarino‏ @mattgiammarino 1 Oct 2018
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      Replying to @Plinz

      Ok, now I am stuck here! (No pressure to respond, I don't mean to use all your valuable thought cycles!). I think I have two issues. 1) What is an invariance? (is it a mathemaical description of a state space which stays the same for all possible input patterns?). #naivequestion

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      Joscha Bach‏ @Plinz 1 Oct 2018
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      Replying to @mattgiammarino

      An invarance is an aspect of the data that does not change. For instance, all even numbers have in common that their lowest bit is 0. All Russian words have in common that none contains an h. All cells contain carbon.

      10:58 PM - 1 Oct 2018 from South Beach, San Francisco
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        2. mattgiammarino‏ @mattgiammarino 4 Oct 2018
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          Replying to @Plinz

          (HI!) This is cool to ponder! The way that invariances relate to reasoning still eludes me... (and seems important wrt ground truth) E.g how can I think about the 'reasons' cell contain carbon so to 'make this invariance conditional on its semantics' (a phrase I don't quite get!)

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        3. Joscha Bach‏ @Plinz 4 Oct 2018
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          Replying to @mattgiammarino

          “contains” is a transitive part-of relationship. Specifically, it can be defined as the transitive hull of the relationship of a set to a true sub-set. You can use that to compute what Aristotle called the causa materialis.

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