One-way doors are decisions that are irreversible, or at least very difficult to reverse. Two-way doors are decisions you can undo easily. If you’re faced with a 2-way-door decision, make it quickly and move on. Don’t spend unnecessary time preparing...

Representative problems are simple, often small problems that uncover deeper issues. It’s not always obvious when a problem is representative of a deeper or more widespread issue. But there are some qualities that suggest there’s more to the problem t...

Precision, recall, and F1

When an experienced driver drives in normal conditions, they are at ease. They make decisions without thinking about it. But when drivers are first learning to drive, they do it in slow controlled environments like an empty parking lot. Even when condition...

Why the familiar razor about unnecessary entities is sharper as a habit of work than as a slogan, across code, debugging, and ML.