Truth-seeker. On a mission to drive cost of living to zero. Founder @ Lookout, Investor @ SNR (11x🦄). Believer in founding ideals of 🇺🇸

Joined May 2008
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The #1 question every founder and investor should be asking is: What’s defensible in AI? I'm publishing a series of posts that were previously only shared privately covering principles of defensibility in technology markets and how they apply to each layer of the AI stack. The first drops today (and includes a bonus bedtime story!): writing.snr.vc/p/defensibili…
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This is the fallacy of politicians: they conflate allocating capital with actually solving problems. If you spend money, then light it on fire, nothing happens. Intentions do not create outcomes. Solving problems requires getting in the weeds and efficiently addressing root causes with science, engineering, scaling, etc.
Replying to @bourscheid
I would make MacKenzie Scott look like Elon Musk with how much I gave away. You’d make me President through sheer gratitude alone. The tips I would give service workers would change lives on the daily. My philanthropy would disrupt the monetary system. I just don’t get it.
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Kevin Patrick Mahaffey retweeted
Replying to @dropalltables
Relevant Reason skit:
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Oh yes, I remember that Bond film where the villain decarbonized the auto industry, brought fast internet to everyone on the planet, and helped paralyzed people interact with the world again.
Elon Musk is a real-life Bond villain ft.trib.al/zAOuVKk
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Fable is great but I've found it's always confident, sometimes right.
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Kevin Patrick Mahaffey retweeted
It's time for California's housing boom. Many recent laws have made building homes easier across the state, but only a few know how to use them. We're launching @infillworks to make it simple for anyone to figure out how to add new housing to existing lots in the neighborhoods we love.
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We need more housing in California. @typefive makes it easy to see where you can help create gentle density in existing, beautiful neighborhoods.
It's time for California's housing boom. Many recent laws have made building homes easier across the state, but only a few know how to use them. We're launching @infillworks to make it simple for anyone to figure out how to add new housing to existing lots in the neighborhoods we love.
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Can we please just gene-drive ticks out of existence now?
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Is Claude going to be the most popular or least popular baby name this year?
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Kevin Patrick Mahaffey retweeted
We raised $6M led by Sequoia to build the future of travel. Watch me plan a perfect trip to Mexico City in 3 minutes. Flights, hotels and a full itinerary that matches my preferences. All bookable on the spot. Available today, free to use.
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Unitree is the best defense-tech company the CCP has ever funded. Big win for their portfolio.
Unitree was valued at $1.7B in June 2025. Figure was valued at $39B in September 2025. Both valuations are off. You decide.
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Kevin Patrick Mahaffey retweeted
Will Aalo focus only on powering data centers forever? No. The beauty is that, as we come down the cost curve, more and more markets will open up. Lower cost, rapidly deployable nuclear will do a LOT of good for humanity.
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Fast spectrum reactors that fully utilize fuel will be one of the most important technologies in the mid-2030s as the current generation of advanced fission reactors get to scale, putting pressure on the Uranium supply chain. FD: long @AaloAtomics
FACT: More than 90% of the potential energy still remains in spent nuclear fuel. Some advanced reactors under development could consume or even run on this fuel in the future.
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In Banff to talk about hot (and ideally gooey) rocks. Superhot geothermal has the potential to be a significant contributor to global clean energy, but lots of engineering required to make it competitive with advanced nuclear, PV storage, (maybe) fusion. Thanks @cleanaircatf, @BezosEarthFund for bringing folks together to close the gaps between dreams and gigawatts delivered.
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In the fullness of time, the only premium tokens will be for national security/sovereignty reasons.
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OpenAI assembling Google's suite of products via partnership.
Thrilled to have worked closely with OpenAI to build @OdessiaTravel. In 5 months, we built a travel agent that can plan and book entire trips: flights, hotels, experiences, places to see – all personalized to you. Options come back in a few seconds with rich visuals. Grateful for @OpenAIDevs for the partnership.
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Booking adventures just got a lot more epic. Congrats @FDavidsonT
Meet Odessia. She plans and books entire trips in one conversation. Apparently, she's the goddess of travel.
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A banner when foreign accounts comment on US political candidates and issues, especially in advance of elections.
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History books: oddly enough, mosquitos—one of the greatest killers of humans in the history of time—were eradicated as a side project from a pre-AI advertising business.
NEW: Google is seeking approval to release up to 32 million “specially treated” mosquitoes in California & Florida to combat disease.
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Kevin Patrick Mahaffey retweeted
Replying to @dropalltables
Honestly, people in SF should read the original expansion CerdĂ  plans from the 1800s. They faced exactly the same issues we do, and thought about everything: air quality, sunlight, commuting, density. He even designed it accommodating for technologies that didn't exist yet but were growing fast.
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