HNHacker News
TopNewBestAskShowJobs

teej

12,232 karma · joined October 5, 2008

twitter » teej_m

gmail » teej.murphy@

current » Linear

prior » Downlink (YC W24), Chaturbate, Minted, Zynga, MinoMonsters

submissionscomments
teej··on Macrodata Refinement
This is a recreation of a fictional computer program from the excellent Apple TV show - Severance.

The work is mysterious, and important.

Season 2 is going now. It’s one of my top 3 shows of the last decade, highly recommend it.

teej··on Emerging reasoning with reinforcement learning
Why this behavior emerges is an active area of research. What they did is use reinforcement learning, this blog post replicates those findings. The “recipe” is detailed in the R1 paper.
teej··on Emerging reasoning with reinforcement learning
My mental model for chain-of-thought is not “reasoning”. It’s more of an iterative search through the latent space of the model.
teej··on Emerging reasoning with reinforcement learning
The way you taught chain-of-thought before was with supervised fine tuning (SFT). During training, you have to rate every sentence of reasoning the model writes, many times, to nudge it to reason correctly.

But this approach to teach chain-of-thought doesn’t do that. In this post, they take a small model (7B) that already knows math. Then they give it a relatively small number of problems to solve (8k). They use a simple reinforcement learning loop where the only goal is to get the problem right. They don’t care how the model got the right answer, just that it’s correct.

This is part of the “recipe” that DeepSeek used to create R1.

After many iterations, just like DeepSeek, they found that the model has an “aha” moment. It starts emitting chains-of-thought where it wasn’t before. And then it starts getting the math answers right.

This is the gist of it. I don’t fully understand the recipe involved.

Can you teach small models to “think” just using RL? How small can they be? What tasks does this work for? Is just RL best for this? RL+SFT? Everyone’s trying to figure it out.

teej··on Emerging reasoning with reinforcement learning
I’ll give a “wtf does this mean” view.

We have observed that LLMs can perform better on hard tasks like math if we teach it to “think about” the problem first. The technique is called “chain-of-thought”. The language model is taught to emit a series of sentences that break a problem down before answering it. OpenAI’s o1 works this way, and performs well on benchmarks because of it.

To train a model to do this, you need to show it many examples of correct chains of thought. These are expensive to produce and it’s expensive to train models on them.

DeepSeek discovered something surprising. It turns out, you don’t need to explicitly train a model to produce a chain of thought. Instead, under the right conditions, models will learn this behavior emergently. They found a way for a language model to learn chain of thought very cheaply, and then released that model as open source.

Thought chains turn out to be extremely useful. And now that they’re cheap and easy to produce, we are learning all the different ways they can be put to use.

Some of the open questions right now are:

- Can we teach small models to learn chain-of-thought? (yes) How cheaply? On which tasks?

- Can we generate thought chains and just copy/paste them into the prompts of other models? (yes) Which domains does this work for? How well does it generalize?

That’s what this post is going after.

teej··on Ask HN: Anyone else find LLM related posts causing them to lose interest in HN
I have been on HN for 16.5 years and I don’t plan to stop now. It’s been worse.

Trends come and go. The stories and comments come and go. HN is constantly changing. You can’t attach yourself to how something was before. It will change again.

Thats just life.

teej··on Show HN: Value likelihoods for OpenAI structured output
Fair dice rolls is not an objective that cloud LLMs are optimized for. You should assume that LLMs cannot perform this task.

This is a problem when people naively use "give an answer on a scale of 1-10" in their prompts. LLMs are biased towards particular numbers (like humans!) and cannot linearly map an answer to a scale.

It's extremely concerning when teams do this in a context like medicine. Asking an LLM "how severe is this condition" on a numeric scale is fraudulent and dangerous.

teej··on Databases in 2024: A Year in Review
Are people choosing SQL Server independently of the Microsoft ecosystem? My understating is that you typically use it because you’re forced to choose a MS product.
teej··on What is metformin's secret sauce?
Source?

Metformin is one of the most widely studied drugs on the market. I can't find any study that links it to PSP (Progressive Supranuclear Palsy).

teej··on Llama.cpp Now Supports Qwen2-VL (Vision Language Model)
It’s absolutely possible to put a backdoor into an LLM.

https://arxiv.org/abs/2408.12798

teej··on Llama.cpp Now Supports Qwen2-VL (Vision Language Model)
> Unsurprisingly they all get quite stubborn if you ask them about topics like Tiananmen Square

Has anyone made a political censorship eval yet?

teej··on Show HN: Tea-tasting, a Python package for the statistical analysis of A/B tests
I recommend “Trustworthy Online Controlled Experiments”. If you’re only going to read one book about it, it should be this one. It will walk you through why we experiment, how it’s typically done, and how to use them to improve your decision making.
teej··on CrowdStrike Update: Windows Bluescreen and Boot Loops
The OS absolutely matters
teej··on OpenAI Acquires Rockset
These pages are done for SEO. You get loads of inter-linked pages rich with keywords that match user searches exactly.
teej··on Open Source Python ETL
Don’t build ETL on Tableau. They haven’t made meaningful product progress in 10 years and completely missed the changes in data transformation. They are playing catch-up, they don’t understand where the world is moving.
teej··on Costco is building out an ad business using its shoppers' data
The general consumer does not care about this at all. If Costco passes this revenue down to consumers as savings, it will only drive more purchases.
teej··on Hacker confirms access through infostealer infection [withdrawn]
Snowflake published these rules earlier today - https://community.snowflake.com/s/article/Communication-ID-0...
teej··on Hacker confirms access through infostealer infection [withdrawn]
In response to this incident, I just put together a Python CLI to help you monitor and take action against suspicious sessions in your account.

https://github.com/Titan-Systems/titan-security-tools

teej··on Hacker confirms access through infostealer infection [withdrawn]
Santander claims:

"Following an investigation, we have now confirmed that certain information relating to customers of Santander Chile, Spain and Uruguay, as well as all current and some former Santander employees of the group had been accessed. Customer data in all other Santander markets and businesses are not affected."

https://www.santander.com/en/stories/statement

teej··on Hacker confirms access through infostealer infection [withdrawn]
> Snowflake internal staff do not have access to read customer data

By default, no. But it is standard operating procedure for sales engineers to request and be given access to customer data so they can build demos.

teej··on Hacker confirms access through infostealer infection [withdrawn]
The query that Snowflake provides to identify privileged users is wrong.

I wrote a better version here: https://gist.github.com/titan-teej/924dcb42604a98b90d6419262...

TL;DR they don't check for users who can transitively gain admin access.

teej··on Pixar to undergo 20% layoffs in 2024
Just watch the credits to see how much human labor goes into animation.
teej··on RAM, Tesla and Subaru Have Worst Drivers, While BMWs Have Highest DUI Rates
Accidents per mile driven is the standard measurement. I don’t know what accidents per driver is meant to tell you.
teej··on What We Watched: A Netflix engagement report
> In total, this report covers more than 18,000 titles — representing 99% of all viewing on Netflix — and nearly 100 billion hours viewed.
teej··on What We Watched: A Netflix engagement report
I noticed that the watchtime of `You` was split half-and-half between the new season 4 and the prior seasons 1-3. I was curious about the total results by show, including all seasons. Here's the top 25:

    TITLE                 TOTAL HRS WATCHED
    -----                 -----------------
    Ginny & Georgia       967,200,000
    The Night Agent       812,100,000
    You                   766,300,000
    Outer Banks           740,400,000
    The Walking Dead      738,600,000
    The Glory             622,800,000
    La Reina del Sur      616,800,000
    CoComelon             601,200,000
    Suits (2011)          599,100,000
    The Blacklist         596,900,000
    Manifest              581,900,000
    Grey's Anatomy        560,300,000
    Wednesday             507,700,000
    Gilmore Girls         505,800,000
    Breaking Bad          505,000,000
    Queen Charlotte       503,000,000
    Friends (1994)        448,500,000
    Love Is Blind         439,300,000
    Lucifer               434,300,000
    The Big Bang Theory   420,400,000
    Shameless (U.S.)      392,600,000
    PAW Patrol            392,300,000
    New Amsterdam (2018)  375,500,000
    Brooklyn Nine-Nine    358,900,000
    Firefly Lane          342,700,000
teej··on What We Watched: A Netflix engagement report
This isn't a marketing effort, it's a press release for Hollywood insiders.
teej··on Launch HN: Bracket (YC W22) – Two-Way Sync Between Salesforce and Postgres
Salesforce reps don't even know what Heroku Connect is. I couldn't get someone to sell it to me! I think the idea is great, glad to see someone picking it up.
teej··on Cybertruck Launch
This paper is nearly 20 years old and does not reflect the state of the world today.
teej··on Maryland Fried chicken: A storied dish with Titanic history
Yep, sort of how a Baked Alaska is called that because Alaska is cold.
teej··on Google to invest up to $2B in Anthropic
Yep, that’s already a given.
← PreviousPage 2 of 34Next →