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Data Science allows us to extract meaning from and interpret data.

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How an eval set is built, and why it rots

How an eval set is built, and why it rots

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10 min read
Your holiday library is probably right. Here are the days it got wrong for us, and the correction layer we built

Your holiday library is probably right. Here are the days it got wrong for us, and the correction layer we built

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Comments 1
4 min read
Does Market Fear Actually Predict Trader Losses? I Tested It With Real Hyperliquid Data

Does Market Fear Actually Predict Trader Losses? I Tested It With Real Hyperliquid Data

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4 min read
Recursive CTEs, explained from first principles

Recursive CTEs, explained from first principles

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5 min read
Broadcom and Ford dropped NetIncomeLoss from their 2025 XBRL: a quick check for SEC tag changes

Broadcom and Ford dropped NetIncomeLoss from their 2025 XBRL: a quick check for SEC tag changes

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4 min read
When Synthetic Data Isn't Enough: A Real Talk About Validating Financial ML Models

When Synthetic Data Isn't Enough: A Real Talk About Validating Financial ML Models

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3 min read
TimesFM 3.0: A Practical First Look at Foundation Models for Forecasting

TimesFM 3.0: A Practical First Look at Foundation Models for Forecasting

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4 min read
The CoA parser that had to get worse before it got useful

The CoA parser that had to get worse before it got useful

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4 min read
Finding charts that look like this one

Finding charts that look like this one

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6 min read
When is a CSV cell a number?

When is a CSV cell a number?

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5 min read
Your backtest beat a t-test. Would it beat a placebo?

Your backtest beat a t-test. Would it beat a placebo?

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4 min read
5 Python scripts that turn a CSV into a publication-quality map

5 Python scripts that turn a CSV into a publication-quality map

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3 min read
I fact-checked 5 viral "my AI bot made money" posts against primary data. None survived.

I fact-checked 5 viral "my AI bot made money" posts against primary data. None survived.

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5 min read
Cohort Retention in pandas: Three Mistakes That Make Your Curve Lie

Cohort Retention in pandas: Three Mistakes That Make Your Curve Lie

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3 min read
HN "Who is hiring?" in 2026: a third fewer companies, and 2+ job seekers for every one

HN "Who is hiring?" in 2026: a third fewer companies, and 2+ job seekers for every one

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Comments 2
4 min read
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