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Jeff Kaufman

@jefftk.com

Contra dance musician, parent, effective altruist, biosurveillant, software engineer, blogger. www.jefftk.com

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15.11.2024
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Latest posts by Jeff Kaufman @jefftk.com

[BOS] I'm hosting free introductory workshops on running sound for contra dances and other small folk events. I'll be going through the same material on 3/19, 3/23, and 4/10; let me know if you'd like to come to one of them?

05.03.2026 02:19 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Introducing and Deprecating WoFBench We present and formally deprecate WoFBench, a novel test that compares the knowledge of Wings of Fire superfans to frontier AI models. The benchmark showed initial promise as a challenging evaluation,...

We present WoFBench, a novel test that compares the knowledge of Wings of Fire superfans to frontier AI models. The benchmark unfortunately proved to be saturated on creation. We note that saturation joins human extinction on the list of reasons for concern about the pace of AI progress.

01.03.2026 18:17 πŸ‘ 4 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0
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Here's to the Polypropylene Makers Six years ago, as covid-19 was rapidly spreading through the US, my sister was working as a medical resident. One day she was handed an N95 and told to

Six years ago, 80 workers moved into a plastics factory, and stayed there for a month. In those 28 days they produced 40M pounds of polypropylene, enough for maybe 500M N95s. Ordinary people, looking at their situation, and thinking creatively about how to do their part.

27.02.2026 03:59 πŸ‘ 9 πŸ” 2 πŸ’¬ 1 πŸ“Œ 0
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Storing Food I think more people should be storing a substantial amount of food. It's not likely you'll need it, but as with reusable masks the cost is low enough I think it's usually worth it. It's hard for me ...

I think more people should be storing a substantial amount of food. It's not likely you'll need it, but as with reusable masks the cost is low enough I think it's usually worth it.

23.02.2026 01:41 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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You May Already Be Canadian I learned a few weeks ago that I'm a Canadian citizen. This was pretty surprising to me, since I was born in the US to American parents, both of which had American parents. You don't normally suddenly...

I learned a few weeks ago that I'm a Canadian citizen. This was pretty surprising to me, since I was born in the US to American parents, but with Bill C-3 anyone with any Canadian ancestry is now Canadian. Perhaps you are too?

19.02.2026 16:00 πŸ‘ 4 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0

This week I'll be playing contras up and down the mid-Atlantic coast with Cecilia Vacanti (Kingfisher); Alex Deis-Lauby calling:

* Wed 2/18: Princeton
* Thr 2/19: Philly
* Fri 2/20: DC
* Sat 2/21: Lancaster
* Sun 2/21: Brooklyn

Come dance, and/or let me know if you want to try to meet up!

16.02.2026 23:03 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Text Posts from the Kids Group: 2025 Another round of liberating kid posts from Facebook. For reference, in 2025 Lily turned 11, Anna turned 9, and Nora turned 3. (Some of these were from me; some were from Julia. Ones saying "me" coul...

As the kids say funny things Julia and I put them in a FB group because it's a convenient way to share them. But I don't trust FB to keep things around long term, and I don't want these to be limited to people with FB access, so with my 11:30pm flight delayed to (so far) 2:15am I've run an export.

16.02.2026 09:58 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Gemini's Hypothetical Present I use several AI models at work, switching between them based on which is best at the kind of work I'm doing. In my limited testing I've found Opus 4.6 to be the best coder (via Claude Code) and has t...

Gemini's base state seems to be that it's convinced it's 2024 and needs Search to bring it up to speed. If you look into its Thinking it often seems to put a lot of effort into keeping track of everything recent as a giant hypothetical.

13.02.2026 02:26 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Ending Parking Space Saving Shoveling out a parking spot is a pain, and many snowy places have a culture where when you leave you put some kind of

Reserving a parking space because you shoveled it is rude, illegal, and inefficient, but if you're the only person who doesn't you'll come back to nowhere to park. The mayor asking us all to move space savers would break the link from "car in spot" to "they moved my chair" to "tire-slashing time".

10.02.2026 02:33 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Playing with an Infrared Camera I recently got a Thermal Master P1 infrared camera attachment for my phone. The goal was a house project, but it's also a great toy, especially with the kids. Getting a room pitch black but still bei...

I recently got an infrared camera attachment for my phone. Getting a room pitch black but still being able to 'see' with the phone was fun, but the real fun was in exploring to observe all these thermal properties we'd never thought about.

07.02.2026 03:31 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Far-UVC is also much more effective with large rooms with long sight lines, so the dance hall I pictured is a great case for it.

01.02.2026 22:31 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 1

I like those a lot! My impression is they're still much louder per CFM (or equivalent CFM) than far-UVC, though. But the real question is, if you need a given amount of air cleaning in a given situation, is the house level within what you can accept.

01.02.2026 22:30 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Box fan-based air purifiers are usually more cost effective than far-UVC if you're using them in a situation where noise is not an issue and you can run them on "high". But noise is often a big issue, and people respond by running fan-based purifiers on "low" or even turning them off.

01.02.2026 18:36 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Differentially Scary Movies This post has spoilers for My Neighbor Totoro, Frozen, Bambi, and the Lion King People at different stages of development enjoy different things in movies. Some of the best children's movies are able...

People at different stages of development enjoy different things in movies. Totoro and Frozen are good examples of children's movies that are able to make things scary or intense for the adults without being too much for little kids.

01.02.2026 14:37 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
BIDA - Boston Intergenerational Dance Advocates

[BOS] Alex Cumming, Stephen Thomforde, and I (Whirlwind) are playing BIDA on Sunday, with Tommy Linden calling. Apparently some people will be wearing overalls.

7:30-10:30, Cambridge Masonic Hall

30.01.2026 22:10 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Rolling Commercial Jetliners Very few people have been on a plane performing a barrel roll, but we could fix this. Commercial aircraft could roll in revenue service, and if you had your window shade down you wouldn't even notice ...

Very few people have been on a plane performing a barrel roll, but we could fix this. Commercial aircraft could roll in revenue service, and if you had your window shade down you wouldn't even notice it.

30.01.2026 03:23 πŸ‘ 1 πŸ” 1 πŸ’¬ 0 πŸ“Œ 0
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Dario Amodei β€”Β The Adolescence of Technology Confronting and Overcoming the Risks of Powerful AI

This is a pretty good overview of the near future of AI, and the major challenges, very close to how I see it: www.darioamodei.com/essay/the-ad...

(Written by Dario Amodei, Anthropic co-founder)

28.01.2026 01:18 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Far-UVC: continuous, safe, quiet protection against airborne diseases

More context on this tech: faruvc.org

26.01.2026 19:14 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Aerodrop Claim a free far-UVC lamp

Do I know anyone who wants a far-UVC lamp? Some friends of mine are giving away a bunch, if you'd actually use it: aerodrop.org

26.01.2026 19:13 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

[BOS] Sledding again today at President's Lawn, ~4:30pm if anyone wants to join (happy to lend sleds!)

26.01.2026 19:10 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

Wouldn't have been a terrible place to be, but home is better. Looking forward to playing with the kids in more snow than we've had in their memories!

25.01.2026 14:22 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0

Back in Boston from SF after a red eye. Flight was delayed 11:30pm to 1am because of a missing engine panel, but I'm super grateful they were able to resolve it. Alternative worlds where the flight was cancelled I would have been stuck in SF for days due to incoming Boston snow.

25.01.2026 14:21 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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19.01.2026 22:11 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

[BOS] We're planning on going sledding around 5pm on President's Lawn at Tufts if anyone wants to join us.

19.01.2026 14:08 πŸ‘ 3 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Forfeiting Ill-Gotten Gains It's a holiday. The cousins are over, and the kids are having a great time. Unfortunately, that includes rampaging through the kitchen. We're trying to cook, so there's a

Kids are smart, and if you want to limit behavior the combination of the gains from rule-breaking and penalty from punishment need to put the kid in a worse position than if they'd never broken the rule.

17.01.2026 00:16 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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The Default Contra Dance Weekend Deal The "dance weekend" is a very common pattern for contra dance communities around the country. I think of the central example as something like: Two bands, two callers. Dancing (with short breaks)...

As someone who has both played for and organized dance weekends, I thought it might be helpful to try and write down what I think of as typical if an event is bringing in a band or caller from out of town.

16.01.2026 00:46 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Contra Dance as a Model For Post-AI Culture I play for contra dances, and a core part of our culture is that we always have live music. It's not that live music is categorically better: if you ran a test where you put down a curtain in front of...

Contra dances insist on live music even though in many ways recorded music would be better. In a sense, people on stage playing for dancing has been obsolete for decades, but we keep doing it because that's the culture we want.

As AI progressively outpaces humans, I like this as a model to follow.

13.01.2026 06:52 πŸ‘ 6 πŸ” 1 πŸ’¬ 0 πŸ“Œ 1
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Stretch Hatchback Our family has half a Honda Fit, and it's great! Reliable, pretty good mileage, holds our family of five plus a vacation's worth of luggage, seats fold flat for when I'm bringing sound equipment to d...

I want someone to make an 8-passenger car by stretching a hatchback.

11.01.2026 16:34 πŸ‘ 1 πŸ” 0 πŸ’¬ 2 πŸ“Œ 0
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No, wages have grown faster than inflation, and rent is declining as a fraction of median income.

08.01.2026 14:01 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Rents Are High, But Not Skyrocketing I hear people talking about

I hear people talking about "skyrocketing" rents, with the idea that rent is going up quickly. But when I look at the data what I see is that rent is high and stable. Which is still bad, but it's differently bad.

08.01.2026 02:41 πŸ‘ 6 πŸ” 1 πŸ’¬ 1 πŸ“Œ 0