Short notes on things I've discovered — 18 TILs so far
**TL;DR:** Keras is the high-level API for building and training neural networks — not a universal machine-learning API. Regression is a *task type*, not a model kind: the same Keras machinery does it…
While building a single neuron from scratch in NumPy for the DLH machine-learning curriculum (classifying MNIST handwritten digits), I had to answer the question every ML beginner meets: how do you sc…
The DLH machine-learning curriculum had me build a single neuron from scratch in NumPy — classifying MNIST handwritten digits, the same project as my [training loop](/til/ai/training-a-single-neuron-l…
After building a single neuron from scratch in NumPy for the DLH machine-learning curriculum, the next step was the jump that gives "deep" learning its name: stacking two layers instead of one. We wer…
In the DLH machine-learning curriculum I built a `Neuron` class in NumPy that classifies MNIST digits: it takes an image's pixels as inputs **X**, weighs them (**W**), adds a bias (**b**), and outputs…
While building a Gaussian Mixture Model from scratch in NumPy for the DLH machine-learning curriculum (the clustering module — same project as my [unsupervised clustering notes](/blog/2026/07/28/unsup…
Think of **axes as nesting depth** in a sequence of brackets.
For a while I have been thinking about the future of software, and it all started like this. Couple of weeks ago, for a reason I still don't know exactly (apart from using DeepSeek in Chat mode), I us…
[Artificial Analysis](https://artificialanalysis.ai/) is so far the only benchmark that
Since I first used [Playwright MCP](https://playwright.dev/) with Claude more than a
This weekend I forgot my Garmin smartwatch in the car and, with the heatwave, was too
While [rebuilding my personal website last week](https://www.rehatuncer.com/blog/2026/06/23/ai-powered-personal-website-rebuild),
I've built the habit of recording important meetings for future reference. My current
During my PhD, I believed advanced statistics belonged to specialized languages like R
`uv` makes Python package management incredibly fast. Here's a quick pattern for
One way to "cure" doomscrolling meaningless content could be replacing it with
[Recursion Visualizer](https://www.recursionvisualizer.com/) is a mildly interesting
I've never cared much about the intricacies of my tennis setup, and I doubt — or hope —