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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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      Taking formal reasoning as typically a publicly observable, material activity exorcizes the banshees. But, there’s something right about the “abstraction” idea. How and when and why does this work? [Eggplant text here and in last, not @cdutilhnovaes]pic.twitter.com/gXxLc31Bme

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    2. David Chapman‏ @Meaningness 12 Jul 2019
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      There’s also something partly right about the “informal reasoning messes up formal” idea, as shown by the Cognitive Reflection Test. https://en.wikipedia.org/wiki/Cognitive_reflection_test …pic.twitter.com/ef2sCzzgO3

      3 replies 1 retweet 19 likes
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    3. David Chapman‏ @Meaningness 12 Jul 2019
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      The essential problem faced by “mere reasonableness”—informal rationality—is the unenumerability of potentially relevant background factors. Part II of The Eggplant explains how that works. (In part: cross the river when you come to it.)pic.twitter.com/LHdfQBbzpt

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    4. David Chapman‏ @Meaningness 12 Jul 2019
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      In the Cognitive Reflection Test, you have to forcefully inhibit your informal reasoning, which gets wrong answers. Nice analysis from @drossbucket! @cdutilhnovaes gives similar examples from the Wason selection task: real-world relevance interferes. https://drossbucket.wordpress.com/2018/12/12/the-bat-and-ball-problem-revisited/comment-page-1/ …pic.twitter.com/gS9ykxsecE

      4 replies 11 retweets 47 likes
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    5. David Chapman‏ @Meaningness 12 Jul 2019
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      Reasoning with external material formal notation (squiggles on paper) accomplishes abstraction in two ways discussed by @cdutilhnovaes: de-semantification and ease of calculation.

      1 reply 2 retweets 21 likes
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    6. David Chapman‏ @Meaningness 12 Jul 2019
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      De-semantification: If you read the word “raven” you usually get a visual image and are primed with all your background knowledge of ravens. Writing ɸ(x) instead of “is a raven” strips that off, and thereby inhibits the “merely reasonable” ways of thinking.

      4 replies 4 retweets 34 likes
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    7. David Chapman‏ @Meaningness 12 Jul 2019
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      Humans evolved for concrete sensorimotor activity (e.g. foraging) and for social relationship maintenance. We didn’t evolve for formal rationality; unfortunately there is no “System 2” logic box in the brain, and we are terrible at it. We can manage only with external aids…

      3 replies 5 retweets 35 likes
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    8. David Chapman‏ @Meaningness 12 Jul 2019
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      Calculation: external formal notation repurposes our sensorimotor skills to perform operations our brains unaided mostly can’t. Logical giant A.N. Whitehead: “By the aid of symbolism, we can make transitions in reasoning almost mechanically by the eye” & @cdutilhnovaes below:pic.twitter.com/thW8x7tW6i

      1 reply 1 retweet 30 likes
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    9. David Chapman‏ @Meaningness 12 Jul 2019
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      A well-designed formalism, skillfully deployed, makes each next calculation step *visually obvious* and therefore difficult to screw up. Mathematicians speak of calculative rationality as “symbol pushing” because at a felt level that’s exactly what we’re doing.

      4 replies 4 retweets 36 likes
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    10. Kabelo Moiloa‏ @11kilobytes Feb 2
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      Replying to @Meaningness

      APLers have a long tradition of thinking about thinking with notation, e.g. the paper https://www.jsoftware.com/papers/tot.htm . I think that they really are the best scholars of programming languages and environments in this particular regard.

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      David Chapman‏ @Meaningness Feb 2
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      Replying to @11kilobytes

      Thank you!

      10:13 AM - 2 Feb 2020
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