Matt Keller

Science does not discriminate.

This is one of the most important studies in sleep science. Van Dongen et al. ran the experiment that changed how we understand chronic sleep restriction. They had subjects sleep 4h, 6h, or 8h nightly for 14 days, testing cognitive performance every 2 hours. The 6h group’s reaction time deficits by day 14 matched subjects who had been awake for 24 hours straight. The 4h group? They performed like someone awake 48 hours. But here’s what makes this study terrifying. The Stanford Sleepiness Scale ratings in Panel B plateau after day 3-4. Subjects stopped feeling more tired even as their cognitive performance continued deteriorating through day 14. Your subjective experience of fatigue is a lagging indicator that eventually just… stops updating. This explains why chronic undersleeping feels sustainable. You’ve adapted to feeling tired. Your prefrontal cortex hasn’t adapted to being impaired. The PVT (Psychomotor Vigilance Task) in Panel A measures lapses in attention. These are the moments where you’re staring at a screen and your brain simply checks out for 500ms. Every additional day of 6h sleep adds more lapses. The curve never flattens. Panel C and D show working memory and processing speed. Same pattern: continuous degradation with no subjective awareness. The practical implications: If you’re sleeping 6h and think you’re functioning fine, you’ve lost the internal calibration to know you’re not. The subjects in this study would have told you they felt “okay” while performing like they’d pulled an all-nighter. For anyone doing cognitively demanding work, this means you cannot trust how you feel. You need to track objective markers: error rates, decision latency, problem-solving throughput. Sleep need is biological, not negotiable. Most adults require 7-9 hours, and the research shows no population-level adaptation to chronic restriction. “I only need 6 hours” is almost always “I’ve forgotten what baseline cognition feels like.“

The longer you spend in tech, the stronger the urge to buy a farm and never touch a computer again in your life.

@nickschifrin @POTUS @jonasgahrstore @NobelPrize Are we the baddies?

NEW: @potus letter to @jonasgahrstore links @NobelPrize to Greenland, reiterates threats, and is forwarded by the NSC staff to multiple European ambassadors in Washington. I obtained the text from multiple officials: Dear Ambassador:   President Trump has asked that the following message, shared with Prime Minister Jonas Gahr Støre, be forwarded to your [named head of government/state] “Dear Jonas: Considering your Country decided not to give me the Nobel Peace Prize for having stopped 8 Wars PLUS, I no longer feel an obligation to think purely of Peace, although it will always be predominant, but can now think about what is good and proper for the United States of America. Denmark cannot protect that land from Russia or China, and why do they have a “right of ownership” anyway? There are no written documents, it’s only that a boat landed there hundreds of years ago, but we had boats landing there, also. I have done more for NATO than any other person since its founding, and now, NATO should do something for the United States. The World is not secure unless we have Complete and Total Control of Greenland. Thank you! President DJT”

If this isn’t grounds for the 25th amendment, I no longer have faith in our already diminished checks and balances.

“Depression cannot hit a moving target.” Best shit I’ve heard all year.

@verge ratcloud.llc

Chamberlain blocks smart home integrations with its garage door openers — again theverge.com/tech/839294/ch…

@David954FLA A deeply flawed hockey team when their leadership is out injured.

What exactly are the Florida Panthers right now? #TimeToHunt

@FortniteStatus JD must be LIVID

🛋️ We’ve temporarily disabled the Simpsons Couch in Fortnite to fix an issue. We’ll fix this and get you and the squad back on the couch to clip your own Simpsons intros as soon as we can.

@SunoMusic Vocal personas (& tuning)

in three words or less, what do you want to see from us in the future?

@E1_Martillo @SleeperMarlins

@SleeperMarlins can someone post my boy bendix with the sock tan please. i need to re circulate the 🐐

The Marlins traded the MLB leader in blown saves for Robby Snelling. Bendix masterclass 👨‍🍳

@voicenotesai 👋

🚨 Early access to Voicenotes Mac app is here. Reply with a 👋 to get the download link in your DMs! PS - Only 100 spots remaining.

@newsystems_ brampton

It's finally here: Brampton Brampton is the world's most intelligent, creative, and fastest model. Brampton dramatically outperforms Grok 3, Claude 3.7 Sonnet, and GPT 4.5. Reply with "brampton" for early access.

This could be an incredible revolution in Cosmology. The Dark Energy model of the universe, which won a Nobel Prize in 2011, may be completely wrong. The accelerating expansion instead is simply because time runs faster in the voids between galaxies. Let me explain:

@HardRockBet 2018 Cincinnati @ UCF. College GameDay was held on campus all day too. youtu.be/fPwPkd9QRRU?si…

What was the best sporting event you’ve ever attended?

@SullyOmarr @sagarjani Care to share?

@sagarjani I have a beefy system prompt I use

50% of our code base was written entirely by LLMs expect this to be ~80% by next year With sonnet we’re shipping so fast, it feels like we tripled headcount overnight Not using Claude 3.5 to code? Expect to be crushed by teams who do (us)

@goldieonice faraim.org/faa/aim/409/ai…

A little to close, no!?

@HardRockBet 42

WIN A $50 BONUS BET!! Predict Ant Edwards combined PTS+REB+AST ⬇️

@unusual_whales *70%

7% of adults in the U.S. said they had drunk coffee in the past day, according to National Coffee Association survey data published this month, an all time high. Back in 2004, less than half of U.S. adults had coffee in the past day.

@AndySlater @HardRockBet What’s the next layer of hell after degeneracy?

30/1 on the Marlins to win the game. Bottom of the 4th. Any takers, @HardRockBet?

@AndySlater @HardRockBet

Hey, @HardRockBet... let's see some slips from bettors who took the Marlins to win after being down 5-0 in the first or in the bottom of the 9th.