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fooker

5,913 karma · joined April 21, 2016

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fooker··on Anatomy of a Lean proof for software engineers
That's a different compactness :)

Math is full of fun overloads like this.

Most of my lean work involves software verification and transition systems. I suspect most people here would be interested in software verification rather than trying to solve unsolved math problems. You'd have a frustrating experience without the required logic background, from my experience dealing with a collaborator's new PhD students.

fooker··on Anatomy of a Lean proof for software engineers
No, 1/0 is not 0 in lean.
fooker··on Anatomy of a Lean proof for software engineers
Yeah artificial intelligence is an ideal solution to natural stupidity ;)
fooker··on Anatomy of a Lean proof for software engineers
Sure, use whatever method of learning that works well for you.

All I'm saying is that you're unlikely to be making effective use of a tool like this without understanding it's theoretical foundations.

fooker··on Anatomy of a Lean proof for software engineers
> Whatever style of proof you're used to, you can write in that style with mathlib.

Yes, you can do that, and it'll be a frustrating experience.

Knowing the theoretical foundations of your tool is a great way to be happy and productive.

Without it you have issues similar to people trying to implement parsers with regex. :)

fooker··on On social reality in China
I have a nice example of this.

Growing up, I was used to cars honking all the time.

Not a thing in US suburbia.

One fine day, there was a gridlock because of people exiting a stadium after a fireworks event, lo and behold, honks all over the place from all cars.

fooker··on Anatomy of a Lean proof for software engineers
Please do not try to understand Lean or proof assistants without first getting a rudimentary understanding of the logic involved. This article sort of skips over it, which is reasonable because it is pretty involved.

Even if you have written a large number of math proofs, you'd usually not have learnt the language or logic of proofs themselves. And even if you are an accomplished computer scientist, logic is not just AND, OR, NOT.

Here is some necessary reading, feel free to find better sources but wikipedia is good too.

* Proof trees - https://en.wikipedia.org/wiki/Method_of_analytic_tableaux

* Constructive/Intuitionistic logic - https://en.wikipedia.org/wiki/Intuitionistic_logic

* Proofs and Types - https://en.wikipedia.org/wiki/Curry%E2%80%93Howard_correspon...

* (In)completeness - https://en.wikipedia.org/wiki/G%C3%B6del%27s_incompleteness_...

* Compactness - https://en.wikipedia.org/wiki/Compactness_theorem

fooker··on Anatomy of a Lean proof for software engineers
Perhaps when you don't understand something, your first step should be trying to understand it?

Especially when it is something other smart people have been advocating.

fooker··on Clef: Open-weight decision models, and new RL fine-tuning platform
This is awesome.

I bet the competition will result in research into how to make these decision models several more orders of magnitude faster and cheaper.

Here's a challenge problem - look at a 1M context window and produce N decisions (different queries) from it in 50-100ms.

fooker··on Surprisingly complex waves reveal the brain's inner workings
Brains are surprisingly resilient. There are documented cases of people losing half their brain and living seemingly normal lives afterwards.
fooker··on Tesla takes on $30B in credit as it approaches unprofitability
Here you go.

https://kalshi.com/markets/kxspacedatacenter/data-centers-in...

https://polymarket.com/event/ai-data-center-in-space-by

fooker··on Surprisingly complex waves reveal the brain's inner workings
Neat, thanks!
fooker··on Surprisingly complex waves reveal the brain's inner workings
This would finally validate the tinfoil hats! :)

To be fair, I have a room that is a bit of a faraday cage (almost no 5g and really atrocious wifi) and I get much better sleep there than other rooms.

fooker··on Surprisingly complex waves reveal the brain's inner workings
An unfolded brain works fine.
fooker··on Surprisingly complex waves reveal the brain's inner workings
One of the requirements for a random thought to be an hypothesis is that it has to be falsifiable with some kind of an experiment.

What would falsify this?

You can seamlessly replace EM in your paragraph with something quantum and it'd still be sort of a reasonable thought.

fooker··on Gemini 4 Argon
Google R Gon lose the AI race
fooker··on Tesla takes on $30B in credit as it approaches unprofitability
> Not moving towards equality is just a selfish choicel.

It is. People are selfish.

Companies even more so.

fooker··on Tesla takes on $30B in credit as it approaches unprofitability
Of course equality is a punishment when you have more to lose than others.

If the world's wealth was equally distributed, it would be pretty punishing for everyone who is commenting on this platform.

fooker··on Tesla takes on $30B in credit as it approaches unprofitability
The plan, as always, is monopoly.

Push out competitors and get the market, bet the market is large enough.

fooker··on Tesla takes on $30B in credit as it approaches unprofitability
> Data centers in space that violate the laws of logistics+thermodynamics?

Are you convinced enough that you are correct to short the stock though?

fooker··on Tesla takes on $30B in credit as it approaches unprofitability
Six months is the ideal time for people to forget about what you claimed.

Opposite seasons, new wars, at least one new thing to be outraged about.

fooker··on Tesla takes on $30B in credit as it approaches unprofitability
I think you missed my point.

I'm arguing that the fair value of boring companies making reliable things should be much higher. We don't do that, you have to promise hot air based growth to prevent your valuation from crashing.

The behavior we incentivize is the one we'll get.

fooker··on Tesla takes on $30B in credit as it approaches unprofitability
>after losing to the Chinese

The total market cap of all the Chinese car companies combined is about 300B.

Tesla alone is worth ~5x that, because the market rewards this behavior of chasing new things.

If Tesla suddenly pivoted to 'caring about cars' and tried their best to produce low cost reliable EVs, the market is going to punish them by valuing them at less than 300B. That is, if they succeed at that. If they fail, which would be more plausible, they go bankrupt.

Why would they voluntarily do that?

We could do that by changing public opinion or regulating what public companies must do/report, but that seems somewhat unlikely. It's so much easier to claim that autonomous driving will be solved in six months :)

fooker··on Tesla takes on $30B in credit as it approaches unprofitability
This will get TSLA valued as a car company.

They want to be valued as a ~~scifi~~ tech company.

Which is fair, given that the market (and by extension we) chose to brutally punish boring car companies that make reliable high volume cars.

fooker··on Jeff – Jev-compatible 0.8B decision models, trained at home, ~30 ms
Right.

Once you discover what the useful problem to solve is and how to utilize it in production, you can of course replicate it.

This is not alchemy taught by some wizard in secret.

Very often, the innovation is in identifying what to build, what has interesting use cases, what people will pay for.

Once this is established, there is further research optimizing it further, replicating it locally, etc.

The fact that anyone could have come up with it is irrelevant.

fooker··on When oil prices spike, where does the money go?
> The super funds are bigger than the GDP of the economy they reside in!

You are comparing the absolute value of something versus yearly performance.

Market cap vs revenue.

fooker··on Jeff – Jev-compatible 0.8B decision models, trained at home, ~30 ms
Can you host files cheaper than Dropbox? Of course you can. :)
fooker··on Jeff – Jev-compatible 0.8B decision models, trained at home, ~30 ms
> Like what am I missing?

Orders of magnitude faster and cheaper answers.

Sure a MacBook Pro can control a servo motor but maybe an arduino or a cheaper microcontroller for deployment?

fooker··on ASML says it sold 'absolutely nothing' in Europe in 2026
Yes

https://en.wikipedia.org/wiki/Patent_Cooperation_Treaty

https://en.wikipedia.org/wiki/List_of_parties_to_internation...

fooker··on ASML says it sold 'absolutely nothing' in Europe in 2026
India's lead in pharma manufacturing is because of their willingness to ignore US patents for simple drugs , not a technological reason.

That’s great, but does not translate well to ..say.. manufacturing modern chips or jet engines.

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