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Writer of the newsletter bookbear express, on psychology, relationships, non-attachment and taste; based in San Francisco.

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  Taking on total responsibility for another capable adult's life is wrong; each person is responsible for their own psyche and life.

  Their words

  it is very bad to take on total responsibility for a capable adult human being; we are each responsible for our own psyche, our own life.

  bridging the gapavabear.xyz

Cardiologist and founder of the Scripps Research Translational Institute; writes Ground Truths on biomedical research, and wrote Super Agers and Deep Medicine.

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  A coronary calcium score of zero does not mean the arteries are free of disease, and in a younger adult it is far weaker reassurance than it looks.

  Their words

  We know that arteries with a calcium (CAC) score of zero can be highly inflamed, and that high CAC scores are not necessarily high-risk for cardiovascular events.

  The Coronary Artery Inflammation Controversyerictopol.substack.com

Founder of Trilogy Software and principal of Alpha School, the private school network built around two hours a day of AI-delivered mastery learning.

From one piece How to Accelerate Learning & Improve Education | Joe Liemandt 2 beliefs, in the piece's order there

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  Children develop by struggling and failing on the road to success while a caring adult supports them, and school should be running that loop all day instead of leaving it to after-school sports.

  Their words

  The key to developing a child is that they struggle and fail on their road to success supported by a caring adult. And you just want to run that loop.

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  The strongest thing that convinces a child they can do something is not an adult telling them, it is watching a classmate do it.

  Their words

  the number one motivator to get rid of a block. It's actually not the guy as the the biggest one. The number one thing that convinces kids they can do something is watching their classmate do it.

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Physician focused on longevity; wrote Outlive and hosts The Drive.

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  A coronary calcium score of zero does not mean the arteries are free of disease, and in a younger adult it is far weaker reassurance than it looks.

  Their words

  In other words, the absence of calcium is not the same as the absence of disease—it may simply mean the disease hasn’t reached the stage CAC is designed to detect.

  peterattiamd.com

Writer and illustrator, author of Am I There Yet? and Out of the Blue; writes the newsletter Out of the Blue on grief, joy and everyday attention.

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  Adults need their expectations to match reality to feel comfortable, unlike children.

  Their words

  Adult people are comfortable when their expectations match reality, which is not how the child world works.

  Cozy Summermariandrew.substack.com

Physician and neuroscientist at the University of Washington; researches brain health, metabolism and athletic performance.

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  The adult brain's stock of neurons is essentially fixed, and that is no limit on learning, because plasticity is the changing of connections between the cells you already have.

  Their words

  But just because we have a fixed relatively fixed number of cells doesn't mean that we can't change the connections between those cells. And that's happening all the time. And that is, you know, the main principle of neuroplasticity.

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Programmer based in Vancouver who writes at scattered-thoughts.net about databases, programming language design and developer tools; author of the Imp, Dida and Zest language experiments.

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  Humanity is unlikely to change in any fundamental way any time soon.

  Their words

  I have no faith in the people in charge of the future, but humanity isn't going to change any time soon.

  I'm not a catscattered-thoughts.net

Entrepreneur and founder of Blueprint. Publishes a detailed, freely available longevity protocol documenting the food, supplements, devices and measurements he uses on himself.

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  Six hours of exercise a week, split between strength, cardio, flexibility and balance, is the right dose for a healthy adult.

  Their words

  Exercise – 6 hours a week is ideal.

  Bryan's Protocolprotocol.bryanjohnson.com

American writer and long-term traveller. Blogs at tynan.com about travel, owning few possessions, habits and the gear he carries; author of Superhuman by Habit and Make It Big.

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  The traditional path of school, a job, and a house no longer guarantees success.

  Their words

  The guaranteed path to success used to be go to school, follow the rules, get a job, buy a house. That worked for most people who did it. That path is gone now.

  What I Would Do if I Were Gen Ztynan.com

Vice chairman of Ogilvy & Mather Group, the advertising agency; author of Alchemy (2019) and the Wiki Man columnist at The Spectator.

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  The marketing metrics finance departments trust are the ones that sell technology, not the ones that build customer value over time.

  Their words

  the marketing metrics the finance department has faith in and demands from marketing are not those metrics which are most conducive to building brand and customer value over time. They're the metrics which are most conducive to selling tech solutions to the companies.

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Science fiction novelist, journalist and technology activist; writes the daily blog and newsletter Pluralistic, and coined the term enshittification.

• Lovedrcmnd.app

  Science Comics Computers: How Digital Hardware Works

  Their words

  In Science Comics Computers: How Digital Hardware Works, legendary cypherpunk Perry Metzger teams up with Penelope Spector and illustrator Jerel Dye for a tour-de-force young adult comic book that uses hilarious steampunk dinosaurs to demystify the most foundational building-blocks of computers. It's astounding

  pluralistic.net

Emeritus professor of war studies at King's College London; wrote Strategy: A History and Command, and writes about the wars in Ukraine and Gaza as they happen.

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  NATO's Article 5 carries no automatic obligation to fight, and it is still the gold standard for a security guarantee.

  Their words

  Despite its lack of automaticity this remains the gold standard for security guarantees.

  samf.substack.com

Palaeontologist at Queen Mary University of London; studies dinosaur behaviour and writes about what the fossil record can and cannot tell us.

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  Almost all real predation is on prey far smaller than the predator, so the documentary staple of a T. rex taking an adult Triceratops shows the rare exception, not the rule.

  Their words

  These are weird and rare outcomes. These don't usually happen. The vast majority of active predation is on stuff much, much, much smaller than you.

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Mathematician at UCLA, working mainly in harmonic analysis and partial differential equations. Writes What's new, a long-running blog on their research, open problems and expository notes.

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  Physics will be unified again as it has been before; the obstacle is that relativity and quantum mechanics already explain almost everything we can measure.

  Their words

  But I have faith that we've been doing this for centuries and we've made progress before. There's no reason why we should stop.

  youtube.com

Engineering leader and writer; wrote The Manager's Path and Platform Engineering, and blogs at Elided Branches.

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  A career ladder must not be a checklist that guarantees promotion, because a promotion depends on the organisation’s needs as much as on the employee’s skills.

  Their words

  You should not try to create a ladder that functions as a pure checklist or scorecard that guarantees promotion if people check enough boxes; promotions are as much about the needs of the organization as the skills of the employees.

  10 Years of Engineering Ladderselidedbranches.com

Founded CD Baby in 1998 and sold it in 2008, giving the proceeds to a charitable trust for music education. Since then a writer and speaker: five books and 550+ articles, published first at sive.rs, which they hand-code and keep free of advertising.

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  Biological age is moot; people from about 17 with an adult mind until senility or dementia are all pretty much equal.

  Their words

  Your actual biological age is really moot. Anybody over the age of, I don't know, 17 that has a pretty adult mind, all the way up until you're senile and getting Alzheimer's or dementia, anything between there, we're all pretty much equal.

  sive.rs

Historian at Stanford and the Hoover Institution; wrote Milton Friedman: The Last Conservative and Goddess of the Market, on Ayn Rand.

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  Money works only because everyone believes in it, which makes a currency a measure of social trust that fails when the trust does.

  Their words

  And to go back to thinking about money, money works because we all believe in it. It's a form of social trust, and it's a form of belief and faith in our society and in the other people in it. And when that breaks down, the money system will break down as well.

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