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Meaningness's profile
David Chapman
David Chapman
David Chapman
@Meaningness

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David Chapman

@Meaningness

Better ways of thinking, feeling, and acting—around problems of meaning and meaninglessness; self and society; ethics, purpose, and value.

meaningness.com/about-my-sites
Joined September 2010

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    1. David Chapman‏ @Meaningness 12 Jul 2019
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      A 🧵 on studies of formal logic as an embodied, situated, social, cultural, materially-mediated activity. This view contrasts with: 1 formal logics as Platonic mathematical objects 2 formal logic as an innate mental capacity

      7 replies 35 retweets 151 likes
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    2. David Chapman‏ @Meaningness 12 Jul 2019
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      🧵 inspired by @cdutilhnovaes’ _Formal Languages in Logic_, about why formality is useful. Her overall explanation of how formal rationality works is closely similar to mine in _The Eggplant_ draft, so it was exciting reading! https://amzn.to/2NQNsxa 

      2 replies 0 retweets 16 likes
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    3. David Chapman‏ @Meaningness 12 Jul 2019
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      The traditional explanation for the power of logic is “expressive precision,” but the experience of attempting to use logic in AI is that it totally fails for that. Specifically, whenever it encounters nebulosity, which is the main point of Part I of _The Eggplant_.

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    4. David Chapman‏ @Meaningness 12 Jul 2019
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      Another traditional virtue of logic is truth preservation (true premises => true conclusions); but there are nearly no absolute truths in the eggplant-sized world, and deduction does not preserve mostly-truth. So that’s not the answer outside applications in math and CS.pic.twitter.com/JZBRjPqrUH

      4 replies 0 retweets 25 likes
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    5. Lightning_Shade‏ @LightningShade0 12 Jul 2019
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      Replying to @Meaningness

      This example is where probability theory and Bayesian stuff come in. "Sort-of all ravens are black" is really "most ravens are black". The formal outcome is "Huginn is more likely to be black", which might be a useful thing to know.

      3 replies 1 retweet 0 likes
    6. In my country you are a legend!‏ @IMCYAAL 12 Jul 2019
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      Replying to @LightningShade0 @Meaningness

      yeah this seems like a weird thing to say, when we have fuzzy logic, probability rules, Bayesian belief networks etc. built to work with sort-of truths. i mean at the very least it's obvious that if most ravens are black then a specific raven is most likely black as well.

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      David Chapman‏ @Meaningness 12 Jul 2019
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      Replying to @IMCYAAL @LightningShade0

      Fuzzy logic is hardly ever used in practice, because it hardly ever works.pic.twitter.com/nOJnDEdBFr

      6:34 PM - 12 Jul 2019
      0 replies 0 retweets 0 likes

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