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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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      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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    2. 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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    3. 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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    4. 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

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    5. 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.

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    6. David Chapman‏ @Meaningness 12 Jul 2019
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      Examples: Putting terms in a commutative expression in the right order helps a lot even though “logically” it makes no difference. Align key symbols in formulae vertically on the page to group analogous clauses to make it clear what the next step is.

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    7. David Chapman‏ @Meaningness 12 Jul 2019
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      Einstein notation replaces enormously complicated algebraic work with visually simple sub/superscript fiddling that analogizes kinesthetically to physically moving things around by hand. Also uses visually different symbols to track vector dimensions. https://en.wikipedia.org/wiki/Einstein_notation …pic.twitter.com/oBfWkyENZR

      1 reply 0 retweets 27 likes
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    8. David Chapman‏ @Meaningness 12 Jul 2019
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      (h/t @drossbucket for this example)

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    9. David Chapman‏ @Meaningness 12 Jul 2019
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      Two quotes here from @cdutilhnovaes about this. Also two of her key sources, which I haven’t yet looked into myself (but intend to).pic.twitter.com/CqSK3SAcna

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    10. David Chapman‏ @Meaningness 12 Jul 2019
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      “The materiality of mathematics: Presenting mathematics at the blackboard” by @greiffenhagen makes this much more concrete, through close study of a video of a lecturer presenting a proof of the completeness theorem for propositional logic.pic.twitter.com/Ru0J6xGfmz

      4 replies 5 retweets 37 likes
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      David Chapman‏ @Meaningness 12 Jul 2019
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      David Chapman Retweeted David Chapman

      Here’s @greiffenhagen showing the embodied, spacial, temporal, interactive nature of a proving of the Dutch Book Argument (cc @cdutilhnovaes)https://twitter.com/Meaningness/status/1005489362052632578 …

      David Chapman added,

      David Chapman @Meaningness
      Startling serendipity: I began a literature search on the ethnomethodology of formal rationality yesterday, and one of the first things to turn up was a video analysis of someone delivering the Dutch Book Argument! http://www.qualitative-research.net/index.php/fqs/article/view/1172/2585#g232 … pic.twitter.com/L7LoK6t85t
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      1:15 PM - 12 Jul 2019
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      • Jordan Alexander Marcel Arts Wafflemonger and The Toad ⭐⭐⭐ Joogipupu Semaj ‘somewhat “civil’ servant” Eli Sennesh Eirini Malliaraki Raymond
      1 reply 0 retweets 8 likes
        1. New conversation
        2. David Chapman‏ @Meaningness 12 Jul 2019
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          (Going to pick up this unfinished thread tomorrow probably—have other things to do now!)

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        3. David Chapman‏ @Meaningness 13 Jul 2019
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          David Chapman Retweeted David Chapman

          Yesterday’s logic 🧵 got out of control. Shorter 🧵 here on formal logic as a social practice that is a somewhat-contingent product of cultural evolution:https://twitter.com/Meaningness/status/1150166188476862464 …

          David Chapman added,

          David Chapman @Meaningness
          “Ethnomethodology” is basically the empirical study of rationality, both informal and formal, considered as an embodied, situated, material, social and cultural activity. Unfortunately it has its own jargon plus methodological issues; but seems directly relevant to your work.
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          1 reply 0 retweets 3 likes
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        4. End of conversation

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