Blog
Notes on the ideas
behind the tools
Short, sourced articles — every factual claim cites a primary source, listed at the end of each post.
Password strength is mostly length: what entropy actually measures
Entropy — not symbol gymnastics — is what makes a password hard to crack. Here is the arithmetic, and why modern guidance dropped forced complexity rules.
BMI is a screening number, not a verdict
Body Mass Index is useful at population scale and crude at individual scale. What the number can and cannot tell you, according to the WHO and CDC.
How JSON quietly took over the web
A data format sketched to dodge browser plugins became the lingua franca of every API. The short history of JSON, and why its strictness is a feature.
While you're here
The tools the blog talks about: Password Generator, BMI Calculator, JSON Formatter — or browse all tools.