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Data Science

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

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Out-of-Bag Error: The Free Exam You Didn't Know You Were Already Taking

Out-of-Bag Error: The Free Exam You Didn't Know You Were Already Taking

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19 min read
Why "Accuracy" Is the Wrong Metric for Probabilistic Prediction Models

Why "Accuracy" Is the Wrong Metric for Probabilistic Prediction Models

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4 min read
Stop Faking Your Test Data: Why `Faker.js` Breaks the Moment You Have Foreign Keys

Stop Faking Your Test Data: Why `Faker.js` Breaks the Moment You Have Foreign Keys

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5 min read
RAG Retrieval Accuracy: 38%. After the Fix: 87%. The Model Was Never Touched.

RAG Retrieval Accuracy: 38%. After the Fix: 87%. The Model Was Never Touched.

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3 min read
99.4% Accurate but still completely useless?

99.4% Accurate but still completely useless?

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2 min read
Can AI analyze stocks? What it does well, and where it fails

Can AI analyze stocks? What it does well, and where it fails

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6 min read
My Favorite Constant in Retrieval Is 60. Nobody Tunes It. That's the Point.

My Favorite Constant in Retrieval Is 60. Nobody Tunes It. That's the Point.

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2 min read
Indeed 403s you with zero bytes. The companies it aggregates publish free APIs.

Indeed 403s you with zero bytes. The companies it aggregates publish free APIs.

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6 min read
The real cost of Instagram data in 2026 (measured, not estimated)

The real cost of Instagram data in 2026 (measured, not estimated)

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4 min read
I Replaced My sklearn Pipeline With Pure Rust. The Docker Image Shrank 400x

I Replaced My sklearn Pipeline With Pure Rust. The Docker Image Shrank 400x

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7 min read
Linear Regression: From Least Squares to Production-Ready Practice

Linear Regression: From Least Squares to Production-Ready Practice

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6 min read
The TomeVault Instruction Corpus (2026-07)

The TomeVault Instruction Corpus (2026-07)

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6 min read
Feature Importance in Random Forests: The Company That Fired the Wrong Employee Because It Measured the Wrong Thing

Feature Importance in Random Forests: The Company That Fired the Wrong Employee Because It Measured the Wrong Thing

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20 min read
My Machine Learning Project Taught Me More About Software Engineering Than Machine Learning

My Machine Learning Project Taught Me More About Software Engineering Than Machine Learning

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3 min read
We Asked 10 LLMs to Recommend Brands. They Gave Us 29 Different Answers.

We Asked 10 LLMs to Recommend Brands. They Gave Us 29 Different Answers.

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3 min read
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