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kareem_carr's profile
🔥 Kareem Carr 🔥
🔥 Kareem Carr 🔥
 🔥 Kareem Carr  🔥
@kareem_carr

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 🔥 Kareem Carr  🔥

@kareem_carr

Statistics PhD student @Harvard. I have two goals. 1. To make stats fun and accessible and 2. To tell bad stats jokes. Sometimes goal 2 interferes with goal 1.

Cambridge, MA
scholar.harvard.edu/kareemcarr/
Joined June 2013

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    1.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      The very act of turning something into a number is an assumption. 6/

      11 replies 248 retweets 1,612 likes
      Show this thread
    2.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      You can think of an arithmetic as coming from entities living in an underlying space. For instance, 2+2 could mean 2 oranges plus 2 oranges. In which case, "2+2 = 4" means 4 oranges is the same amount of oranges. 7/

      8 replies 14 retweets 426 likes
      Show this thread
    3.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      You can think of an arithmetic as a system of rules like a board game and not think about the underlying space at all. Mathematicians call such systems "formal" which means "I don't care if this stuff really works out, I will apply these rules blindly and hope it makes sense." 8/

      7 replies 21 retweets 572 likes
      Show this thread
    4.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      The reason numbers feel so right is mathematicians have done all the hard work of figuring our how to make calculations track with reality. They kept modifying and refining the number system until everything worked out. It took centuries of brilliant minds to do this! 9/

      8 replies 42 retweets 716 likes
      Show this thread
    5.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      At this point, you're probably like "Kareem, are you for real?" You probably think you've never encountered a calculation that felt weird or unnatural. You have! I'll prove it. 10/

      4 replies 13 retweets 420 likes
      Show this thread
    6.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      One place mathematicians haven't quite figured out how to make things feel as natural is operations around infinity. What is infinity times zero? They just tell you not to do that, right? The reason is because it depends! There is no single answer. 11/

      19 replies 24 retweets 525 likes
      Show this thread
    7.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      If you take "infinity" to mean a process that's growing very large and "zero" as a process that's shrinking, sometimes the shrinking process overtakes the growing one so 0 ⋅ ∞ = 0. Sometimes it's the other way around 0 ⋅ ∞ = ∞. Sometimes they balance out and 0 ⋅ ∞ = 12.

      35 replies 32 retweets 624 likes
      Show this thread
    8.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      Because there's no one thing that always happens, we mostly avoid doing arithmetic with infinity. Doesn't that feel like a bit of a con? They don't have a nice set of rules for it, so they tell you not to do it? That's how it is folks. Math isn't as clean as you think it is. 13/

      11 replies 33 retweets 706 likes
      Show this thread
    9.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      The sense that it all works out nicely is a bit of illusion based on thousands of highly intelligent minds working hard to make sure you know where to step without blowing yourself up. Math is logical but it's not always neat and nice. 14/

      4 replies 32 retweets 618 likes
      Show this thread
    10.  🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      My situation is I analyze data all day. I turn reality into numbers. I'm not a mathematician. I don't get to ignore reality. I'm not a layman that can mostly live without playing with math too much. I have to sit on the border between math and reality and make them line up. 15/

      14 replies 25 retweets 667 likes
      Show this thread
       🔥 Kareem Carr  🔥‏ @kareem_carr 1 Aug 2020

      So when somebody tells me "2+2=5", I WILL ALWAYS ask them for more details rather than just dismissing them as an idiot because maybe they're talking about chickens and turns out that's how chickens work! 🧵/

      5:47 PM - 1 Aug 2020
      • 97 Retweets
      • 1,642 Likes
      • mclean Geoff Krall Jared Ben Vidulich Hackery Bottery mickey Basking Rootwalla James de Vrij Sara HK
      211 replies 97 retweets 1,642 likes
        1. New conversation
        2. _Elijah.‏ @ObaEli_OMoluabi 1 Aug 2020
          Replying to @kareem_carr

          One thing I can take from this fiasco you have experienced in the past few days, is that obscuring reality is not that difficult for people who have been placed in the position of power. No one even ask why They actually fight for what they term as the rule no questions asked

          1 reply 0 retweets 3 likes
        3. Dr. Marlo Barnett, Ambassador of Illinois Tech Ed‏ @marlobarnett 2 Aug 2020
          Replying to @ObaEli_OMoluabi @kareem_carr

          The best answer for my interpretation of this entire thread.

          0 replies 0 retweets 2 likes
        4. End of conversation
        1.  🛠️ Dr. Rhiannon Dauster  🛠️‏ @RhiannonDauster 1 Aug 2020
          Replying to @kareem_carr

          Because you are charitable!https://en.wikipedia.org/wiki/Principle_of_charity …

          0 replies 0 retweets 4 likes
          Thanks. Twitter will use this to make your timeline better. Undo
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        1. New conversation
        2. HarmlessReplyGuy‏ @HarmlessReply 1 Aug 2020
          Replying to @kareem_carr

          now do property

          1 reply 0 retweets 6 likes
        3. Show replies
        1. New conversation
        2. Alex Thompson‏ @AlexBCT 1 Aug 2020
          Replying to @kareem_carr

          My dude, you can never be a former mathematician. That stuff is stamped on your brain for life! There is no escape! Source: I am a recovering mathematician Love the thread, good job explaining a hard-to-explain aspect of math.

          1 reply 0 retweets 11 likes
        3. This Tweet is unavailable.
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        1. New conversation
        2. Stallman’s Beard  Ⓜ️® 💙‏ @StallmansBeard 1 Aug 2020
          Replying to @kareem_carr

          I've used a computer to prove that 4=5.pic.twitter.com/8qp7Ybf9oa

          4 replies 0 retweets 4 likes
        3. ن Miss Ellie Mae‏ @MissEllie_Mae 1 Aug 2020
          Replying to @StallmansBeard

          pic.twitter.com/2sI0297ZSf

          0 replies 0 retweets 1 like
        4. End of conversation
        1. New conversation
        2. Patty Langasek‏ @fvinnash 1 Aug 2020
          Replying to @kareem_carr

          In my heart, I have named this thread, "Kareem Ruins Math".

          1 reply 0 retweets 21 likes
        3. This Tweet is unavailable.
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