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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. John Carmack‏Verified account @ID_AA_Carmack Jul 31

      Old programmers instinctively recognize powers of two, but a younger generation of higher level programmers often don’t. I was pleasantly surprised when my young son was considering 16 and 32 ‘neat’ numbers. It was due to Minecraft.

      113 replies 268 retweets 4,166 likes
      Casey Muratori‏ @cmuratori Jul 31
      Replying to @ID_AA_Carmack

      This happened to me "IRL". Some programmers at a lunch wondered, "If everyone only had one child, how long would it take for humanity to just be one person left?" I instinctively said "about 33 generations, depending on how you count it". They had no idea how I did that :(

      2:58 PM - 31 Jul 2021
      • 36 Retweets
      • 917 Likes
      • Abhishek Malik Tales from Danger's Den omoban stratis bellos C Matrickz Tom®🤘 fstr05 🔺 TriΔng3l 🔺
      22 replies 36 retweets 917 likes
        1. Dmitry Egorov‏ @degorov76 Jul 31
          Replying to @cmuratori @ID_AA_Carmack

          Logarithms are hard

          2 replies 0 retweets 0 likes
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        2. Lorde Edge‏Verified account @elonmusk Jul 31
          Replying to @cmuratori @ID_AA_Carmack

          Replacement rate is 2.1, so roughly 31 generations, but let’s try to avoid this!

          176 replies 99 retweets 2,039 likes
        3. Sir Doge of the Coin‏ @dogeofficialceo Jul 31
          Replying to @elonmusk @cmuratori

          pic.twitter.com/bxh8GL3UFu

          6 replies 4 retweets 56 likes
        4. Show replies
        1. Henrik Karlsson‏ @honk_dice Jul 31
          Replying to @cmuratori @ID_AA_Carmack

          I found it amusing that my wife instinctively guessed ~1000 years.. which matches quite well if a generation averages 30 years the coming 1000 years. and she is definitely no programmer :-)

          0 replies 0 retweets 7 likes
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        1. Daniel O'Connor‏ @Singularitarian Jul 31
          Replying to @cmuratori @ID_AA_Carmack

          Casey maybe you should teach powers of two in Star Code Galaxy.https://starcodegalaxy.com/ 

          0 replies 0 retweets 2 likes
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        2. 𝔻𝕒𝕣𝕚𝕦𝕤 ℝ𝕦̈𝕔𝕜𝕖𝕣‏ @DariusPresent Jul 31
          Replying to @cmuratori @ID_AA_Carmack

          To all the people who did not understand: we are 7.674 billion people, 2 ppl to have a kid so 3.937 billion, now how many times do you need to multiply 2 * 2 to have 3.937? It will be aprox 31-32 times.

          2 replies 1 retweet 17 likes
        3. Brian Marks‏ @supergluee1 Jul 31
          Replying to @DariusPresent @cmuratori @ID_AA_Carmack

          Didn't OP say the end state was a population of 1, not half the current population?

          1 reply 0 retweets 2 likes
        4. End of conversation
        1. New conversation
        2. Morten Hilker-Skaaning‏ @morten_skaaning Jul 31
          Replying to @cmuratori @ID_AA_Carmack

          Captain Pedantic here. If everyone has one child then a couple will have two, assuming an even number of people and everyone is coupled, no population decline. Pedantic out.

          1 reply 0 retweets 6 likes
        3. Jean Jonethal‏ @jonjo747 Jul 31
          Replying to @morten_skaaning @cmuratori @ID_AA_Carmack

          To cap. Pedantic : but then the mother's had 2 children. Which would break the idea. Each child has exactly 2 parents.

          0 replies 0 retweets 11 likes
        4. End of conversation
        1. Shai Machnes‏ @shai_machnes Jul 31
          Replying to @cmuratori @ID_AA_Carmack

          2^10 is roughly a thousand 2^20 is roughly a million 2^30 is roughly a billion 2^33 is roughly 8 billion, or the current human population If you half the population every generation, after 33 generations you're left with 1 person

          0 replies 0 retweets 3 likes
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