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eigenrobot's profile
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@eigenrobot

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masquerobot

@eigenrobot

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Joined July 2013

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    1. Humean Being‏ @MetaHumean Sep 5

      Every time I see someone describe their beliefs as their "priors," I have to fight the urge to punch a hole in the wall.

      3 replies 1 retweet 11 likes
    2. nameless fool‏ @RattelyrDragon Sep 5
      Replying to @MetaHumean

      Is that because Hume frequently assumed first-person and second-person knowledge being based on two different logical functions (to facilitate the flow of his interlocutors), when "you" and "I" are in fact the same form and one logical function?

      1 reply 0 retweets 1 like
    3. Humean Being‏ @MetaHumean Sep 5
      Replying to @RattelyrDragon

      No, it's because no one ever says "prior" when they mean "low priors," they ALWAYS mean "beliefs." Also, Kahneman and Tversky proved that humans aren't probabilistic reasoners, so priors don't exist. But beliefs do. And you mean "beliefs." So say "beliefs!"

      2 replies 0 retweets 4 likes
    4. masquerobot‏ @eigenrobot Sep 5
      Replying to @MetaHumean @RattelyrDragon

      there are actually no statisticians in existence

      2 replies 0 retweets 4 likes
    5. Humean Being‏ @MetaHumean Sep 5
      Replying to @eigenrobot @RattelyrDragon

      Of course people can build and use statistical models. But our brains don't encode subjective probabilities. Probability models exist; subjective priors don't.

      3 replies 0 retweets 2 likes
    6. masquerobot‏ @eigenrobot Sep 5
      Replying to @MetaHumean @RattelyrDragon

      hrmr im not sure the difference between native wetware encodings and the models we kludge out on top of it is really important brains probably dont directly encode words or numbers greater than 20 or w/e either or am I missing your point?

      1 reply 0 retweets 2 likes
    7. Humean Being‏ @MetaHumean Sep 5
      Replying to @eigenrobot @RattelyrDragon

      Kind of missing the point. A prior isn't supposed to be a belief about probability. It's supposed to be a mental state with a probabilistic functional profile. Ramsay showed that, given a coherent set of preferences, we can model all human action as maximizing expected utility...

      1 reply 0 retweets 2 likes
    8. Humean Being‏ @MetaHumean Sep 5
      Replying to @MetaHumean @eigenrobot @RattelyrDragon

      This is the basis of the homo economicus model of human cognition. It assumes that all our desires are utilities, and all our beliefs are probabilities. But if this model is accurate, it makes concrete predictions about how humans will reason. K&T tested those predictions...

      1 reply 0 retweets 2 likes
    9. Humean Being‏ @MetaHumean Sep 5
      Replying to @MetaHumean @eigenrobot @RattelyrDragon

      And found them to be wrong. So much for subjective probabilities and expected utility maximization. Some (many) still hold that Ramsay described an ideal of rationality, rather than providing a descriptively accurate model of human reasoning...

      1 reply 0 retweets 1 like
    10. Humean Being‏ @MetaHumean Sep 5
      Replying to @MetaHumean @eigenrobot @RattelyrDragon

      But the ideal model is not very compelling if it assumes just a completely inaccurate model of human cognition. And people who talk about "my priors" aren't speaking about an ideal, they're describing their own mental states. Inaccurately. But Bayesianism is trendy, so

      1 reply 0 retweets 1 like
      masquerobot‏ @eigenrobot Sep 5
      Replying to @MetaHumean @RattelyrDragon

      yeah I mean I come out of microeconomics we know all of our models are wrong in the sense that core utility function / preference axioms dont hold in reality, but they still serve as a pretty useful approximation in many cases map is not the territory, maps are still helpful

      8:14 PM - 5 Sep 2018
      • 2 Likes
      • Kevin Humean Being
      1 reply 0 retweets 2 likes
        1. Humean Being‏ @MetaHumean Sep 5
          Replying to @eigenrobot @RattelyrDragon

          Sure, we learned a lot from Ramsay, he was a genius. But behavioral econ is taking over, for good reason. Probabilistic maps are close to reality in some respects, quite far removed in others. Let's get some better maps.

          0 replies 0 retweets 1 like
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