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David Petersen

@calcdave.bsky.social
412 followers 449 following 175 posts

A fisher of minds in central Ohio

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Reposted by David Petersen
Matt Enlow @unsolvedmre.bsky.social · 01/07/2026
My feelings about A.I. and math
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David Petersen @calcdave.bsky.social · 02/09/2026
@ologies.bsky.social Thank Pete that the NSF doesn't accept audio grant applications or else @pgirguis.bsky.social would get all the funding! Really personable interview and great voice. I also learned a lot! Thanks for sharing!
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Prof. Nicole Holliday @mixedlinguist.bsky.social · 13/08/2026
I’m in Denmark, trying to figure out why everything seems to run so much smoother here, and this is a bit part of it. The society is built on social trust, and even as a tourist (!) I’m pretty sure that I’m not being scammed around every single corner. Constant vigilance is exhausting.
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Anna F. Walker @spyglassart.bsky.social · 10/08/2026
When Shel Silverstein predicted AI
HOMEWORK MACHINE
The Homework Machine, oh the Homework Machine, Most perfect contraption that's ever been seen.
Just put in your homework, then drop in a dime, Snap on the switch, and in ten seconds time, Your homework comes out, quick and clean as can be.
Here it is-"nine plus four?" and the answer is "three."
Three?
Oh me . ..
I guess it's not as perfect As I thought it would be.
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David Petersen @calcdave.bsky.social · 14/07/2026
@ifycomedy.com I really enjoyed this week’s @gamechanger.dropout.tv episode and your performance was a major part of that. Thanks for the fun!
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Daily Spurious Correlation 🤖 @dailycorrelation.bsky.social · 08/07/2026
xkcd comics published about statistics correlates with The number of concierges in Ohio (r=0.921)
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Franchesca Ramsey @chescaleigh.bsky.social · 24/05/2026
why does the “you can’t fight it” rhetoric around AI feel so familiar?? 🤔
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David Petersen @calcdave.bsky.social · 03/05/2026
Me to 7yo: What's half of 56? 7yo: I dunno. 23? Me: No, that'd be half of 46. 7yo: Oh, then it's 28.
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Edward Luce @edwardluce.bsky.social · 29/04/2026
Reminder to those who can't seem to grasp distinction between median and average. US average income in 2024 was $76,000. US median income was $44,000. The difference is vast inequality. And $44,000 is not a good living.
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Dr Space Junk (Alice Gorman) @drspacejunk.bsky.social · 20/04/2026
Are we meant to forgive SpaceX's destruction of LEO, astronomy, and the night sky for this?
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Matt Salomone @matthematics.com · 20/04/2026
#ITeachMath
IN THIS HOUSE, WE BELIEVE:
YOU ARE NOT A TEST SCORE EVERYONE IS A "MATH PERSON" NEGATIVES HAVE SQUARE ROOTS NO FRACTION IS IMPROPER MATH IS A HUMAN ACTIVITY GOOD TEACHING MATTERS
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Martha Wells @marthawells.com · 08/04/2026
The next Murderbot is out on May 5 www.barnesandnoble.com/w/platform-d...
barnesandnoble.com
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David Petersen @calcdave.bsky.social · 06/04/2026
Ancient dice found in North America showing that Indigenous Americans may have used them to play with other groups they meet. www.thisiscolossal.com/2026/04/ice-...
thisiscolossal.com
12,000 Years Ago, Native Americans Were Playing Games of Chance with Handmade Dice
New research suggests that games of chance developed much earlier—to the tune of 6,000 years—than originally thought.
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Rebecca R Helm @rebeccarhelm.bsky.social · 02/04/2026
The #1 problem with AI: "...the tool requires expertise to validate, but its use diminishes expertise and stunts its growth." taggart-tech.com/reckoning/
taggart-tech.com
I used AI. It worked. I hated it.
I used Claude Code to build a tool I needed. It worked great, but I was miserable. I need to reckon with what it means.
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Dr Space Junk (Alice Gorman) @drspacejunk.bsky.social · 30/03/2026
For the first time, a person who is not a white, American man will see the Moon close-up* with their own eyes. I'm eager to see with their vision. Will it be the same or different? Which cultural influences will be uppermost? #ArtemisII *From 8, 000 km 🧪
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David M. Perry @lollardfish.bsky.social · 21/03/2026
The world does not need more undergraduate history essays but does need more people who can write good ones.
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Christopher Danielson @triangleman.bsky.social · 19/02/2026
"Math is not true because we tell kids it is true; math is true because they can find that truth for themselves. We can find these truths together."
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Starting9 GM - Team Phungo @phungo2008.bsky.social · 03/02/2026
Interesting stat from the article
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Zach Weinersmith @zachweinersmith.bsky.social · 30/01/2026
PPS: I'm not sure how my tone comes across in these posts, because I worry my tech friends will think I'm being pessimistic and my arts friends the opposite. Personally, I feel like someone whose house is being eaten by nanobots, but who is really interested in nanobots.
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the Mountain Goats @themountaingoats.bsky.social · 26/01/2026
"they don't deserve our fear" is a profound thing to say imo & I'm grateful for it distrust yes caution yes. fear God maybe (proverbs 9:10 though I have long-winded thoughts about the fear of God). these men terrorizing citizens may be a lot of things but they don't know the first thing about God
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Dr. Damien P. Williams, dread portent down from a mountain cave @wolven.blacksky.app · 24/12/2025
Feeling this so hard this past several weeks
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David Petersen @calcdave.bsky.social · 17/12/2025
@ryannorth.ca TBF, I do think of you as many things before I think of you as the guy who was stuck in a hole. But, when I think of someone stuck in a hole, I think of you first. www.reddit.com/r/interestin... (I know you had your puppers with you, so this method wasn't on the table)
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David Petersen @calcdave.bsky.social · 22/11/2025
@k8nowak.bsky.social asked if I would be interested in helping a new company write curriculum while I moved states
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Casey S. Pumpkins 🎃 @caseyexplosion.bsky.social · 17/11/2025
Why am I so against generative AI in games? Because I simply do not want my initial reaction to art to be one of suspicion and scrutiny, AI slop is fundamentally damaging my relationship to art and artistry, and I am deeply resentful that it is forcing me to be guarded when I should be wowed.
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David Petersen @calcdave.bsky.social · 16/11/2025
New bullet-holed-plane dropped
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Prof. Nicole Holliday @mixedlinguist.bsky.social · 06/11/2025
In her #NWAV53 plenary, King discusses an example of a juror being dismissed from the pool due to forestressing in the word police (so PO-lice), because the prosecutor claimed that the pronunciation showed animus towards law enforcement. And this is exactly why I study prosody!
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Laura Lopez @ohdearz.bsky.social · 07/10/2025
Valuable info about the Physics Nobel Prize today from Prof. Joseph Barranco at SFSU on Martinis and Devoret being a grad student and postdoc in Clarke's lab at UC Berkeley & Clark and Devoret being immigrants. "California *public* education made this happen. Immigration made this happen." ⚛️
Joseph Barranco posted on social media: Go Bears! Nobel Prize in Physics goes to 3 physicists studying mesoscopic quantum phenomena... Work was done in the 1980s in UC Berkeley Professor John Clarke's lab with his graduate student John Martinis and postdoctoral fellow Michel Devoret... all 3 share the Nobel Prize.  Must also point out that both Clarke and Devoret are immigrants from the UK and France, respectively.  All 3 are pioneers in the race to build the most powerful quantum supercomputers.  California *public* education made this happen. Immigration made this happen.
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David Petersen @calcdave.bsky.social · 06/10/2025
@alliegoertz.bsky.social Matt Groening gave you a quick mention on today's WTF interview about how you were his first podcast even though he'd promised Maron. But, your interview was better
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Daily Spurious Correlation 🤖 @dailycorrelation.bsky.social · 27/09/2025
The distance between Neptune and the Sun correlates with Burglary rates in the US (r=0.969)
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Robert Reich @rbreich.bsky.social · 25/09/2025
The gap between teacher pay and other college graduates’ pay is the highest it’s been in over four decades. Is there a “teacher shortage,” or a shortage of jobs that treat educators with the pay, dignity, and support they deserve?
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Anthony Moser @anthonymoser.com · 26/04/2025
A key difference here is that while either can be incorrect, the structure of Wikipedia *creates context* and the structure of LLMs *destroys context* Wikipedia has linked sources and an edit history showing where information came from and who added it when An LLM just generates text
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Carl T. Bergstrom @carlbergstrom.com · 12/08/2025
1. "'Trusting the experts is not a feature of either a science or democracy," Kennedy said." It's literally a vital feature of both science and of representative democracy. I've written a fair bit about trust in expertise as a vital mechanism in the collective epistemology of science.
scrippsnews.com
RFK Jr. in interview with Scripps News: ‘Trusting the experts is not science’
HHS Secretary RFK Jr. sat down with Scripps News for a wide-ranging interview, discussing mRNA vaccine funding policy changes and a recent shooting at the Centers for Disease Control and Prevention.
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David Petersen @calcdave.bsky.social · 08/08/2025
@k8nowak.bsky.social xkcd.com/3126/
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David Petersen @calcdave.bsky.social · 06/08/2025
If we could just believe women, we wouldn't need the files released.
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David Petersen @calcdave.bsky.social · 23/07/2025
If you finish a video or some social media and you are left feeling angry or smug, make sure you analyze your reasons and question the media you just consumed. -- @escapethispodcast.bsky.social
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David Petersen @calcdave.bsky.social · 02/07/2025
Entering a bank with a Victoria's Secret bag and shouting it's a C cup.
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David Petersen @calcdave.bsky.social · 23/06/2025
@triangleman.bsky.social Message from my wife while I work this morning.
Text message bubbles reading: "Alice is still building a house/furniture/people with the blue blocks. And part of me wants to say 'these are for math, you're doing it wrong' but then she'll say stuff like 'this tv is huge it's...counts number of 10 sticks...sixty blocks!' Or 'these people are tiny. they're only 3 blocks tall. Wait, no, they're TWO blocks TALL, but they're made of three blocks. And I guess this is how she's going to learn match and I should just roll with it."
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David Petersen @calcdave.bsky.social · 12/06/2025
@rhettallain.bsky.social Hi, Rhett! Do you (or the physics community) have a standard example of what 1 Newton feels like? Like Wikipedia has that the force of gravity on an apple is about 2N, but that's still not too intuitive to me. So maybe how hard you'd have to push something common?
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David Petersen @calcdave.bsky.social · 09/06/2025
Usually it's the first 2 panels that make a good business card, but in today's comic it's the last panel that I want.
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David Petersen @calcdave.bsky.social · 23/05/2025
Free jeans?!
Screenshot of a deal on Levi's Men's Jeans Memorial Day Deal. Listed for "Up to 60% off + extra 40% off."
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David Petersen @calcdave.bsky.social · 07/05/2025
@ifycomedy.com You are very right about the "don't you dare close your eyes" line from Aladdin. Dial it down, bud!
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SweenWSweens @sweenwsweens.bsky.social · 02/05/2025
🔑🚪It’s time to escape! Check out the newest Desmos escape room! To play yourself: student.desmos.com/join/3jjxj9 (no need to log in but it will save your progress if you do) Here’s the teacher link to run it with a class: teacher.desmos.com/activitybuil... Have fun!
A mysterious room with an enormous key.
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David Petersen @calcdave.bsky.social · 24/04/2025
I'll be there!
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David Petersen @calcdave.bsky.social · 09/04/2025
To really make money on the stock market you don't actually want it to just go up. You want 2 things: 1. Volatility (goes up and down a lot) 2. Predictability Then, if you have the TIME and MONEY you can ride those waves to fortune. That's why he's doing it. #RichGetRicher
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David Petersen @calcdave.bsky.social · 08/04/2025
@schviftyfive.tv How's the coding going? I'm really proud of you taking the time to learn more!
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David Petersen @calcdave.bsky.social · 31/03/2025
@zachweinersmith.bsky.social The college where my wife is a professor is putting on a play of Beowulf this weekend. So, my son is reading your book to prepare for understanding what's going on.
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Dr. Courtney Gibbons (she/her/xlookup) @courtneygibbons.phd · 28/01/2025
USAspending.gov has some days explorations and a great API for my quant-minded friends who want to see what trillions of dollars of federal grants and loans pay for.
usaspending.gov
USAspending.gov
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Lara Durgavich @ldurgavich.bsky.social · 09/01/2025
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David Petersen @calcdave.bsky.social · 05/01/2025
Tossing it out that someone could use Balatro to teach about operations and why order matters (for the jokers, put +mult before x mult)
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