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michael_nielsen's profile
michael_nielsen
michael_nielsen
michael_nielsen
@michael_nielsen

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michael_nielsen

@michael_nielsen

Searching for the numinous. Co-purveyor of https://quantum.country/ 

San Francisco, CA
michaelnielsen.org
Joined July 2008

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    1. Nadia‏ @nayafia Jun 26
      • Report Tweet

      Nadia Retweeted Robert California fan acct

      I like this q, in the vein of "objective measures of subjective reality" For me: Map colors first: pink-red 2 matches purple 4 (easy), blackish 7 repels eggplant 8 (ugh but ok) Stack em up, 8+7=15, anchor (green) 5, carry (yellow) 1, collapse remaining colors into 7, = 75https://twitter.com/Wparks91/status/1143666051793788928 …

      Nadia added,

      Robert California fan acct @Wparks91
      What happens in your head when you do 27+48?
      Show this thread
      12 replies 0 retweets 45 likes
      Show this thread
    2. Nadia‏ @nayafia Jun 26
      • Report Tweet

      I'm shocked to read responses like @michael_nielsen's who just "know" it's 75. This is why I'm terrible at doing math in my head! 7's in particular are troublesome bc it has the least distinct color

      4 replies 0 retweets 13 likes
      Show this thread
    3. michael_nielsen‏ @michael_nielsen Jun 26
      • Report Tweet
      Replying to @nayafia

      It's not quite "just knowing". More like several half-conscious explanations occur to me at the same time. If the answers conflict I need to think about it carefully, if they're all the same, I'll trust it & feel that I "know" it.

      2 replies 0 retweets 4 likes
    4. michael_nielsen‏ @michael_nielsen Jun 26
      • Report Tweet
      Replying to @michael_nielsen @nayafia

      Looking at what I just wrote... I suspect that me saying more is not helping for demystifying this.

      1 reply 0 retweets 1 like
    5. Leo Polovets‏ @lpolovets Jun 26
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      Replying to @michael_nielsen @nayafia

      I wonder if a more complex example would help clarify what happens in your head. E.g. how do you approach 2484+5839? Or 349753+935731?

      2 replies 0 retweets 2 likes
    6. michael_nielsen‏ @michael_nielsen Jun 26
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      Replying to @lpolovets @nayafia

      Very differently, though still with some overlap: multiple instinctive approximate models, but then detailed step-by-step models for exact computation. Though the exact model will tend to be somewhat made up on-the-fly.

      1 reply 0 retweets 1 like
    7. michael_nielsen‏ @michael_nielsen Jun 26
      • Report Tweet
      Replying to @michael_nielsen @lpolovets @nayafia

      The first one, I immediately think 8200 plus the sum of 84 & 39. I then work that out (123), and there we are 8323...

      2 replies 0 retweets 2 likes
      michael_nielsen‏ @michael_nielsen Jun 26
      • Report Tweet
      Replying to @michael_nielsen @lpolovets @nayafia

      Which is a long way from the grade-school algorithm, I guess. There's certainly some sense of making the algorithm up on-the-fly, in response to a sense of what will work most easily. (And sometimes messing up and backtracking when I realize a different approach would be easier)

      9:56 PM - 26 Jun 2019
      • 2 Likes
      • Leo Polovets Swapneel Mehta
      0 replies 0 retweets 2 likes

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