Knowledge

Short entries, each at most 256 characters of claim — with the measured numbers and sources behind it. No claim without proof.

2026-09-10 · ai · fundamentals

How AI works

An LLM is a next-word guesser at giant scale: text becomes numbers, flows through billions of learned weights, and out comes a probability for every possible next token. All it "knows" was pressed into those weights by predicting trillions of words.

evidence: 3 numbers · 4 sources →

2026-09-06 · tools · economics

Why tools that never upload can stay free

Web tools that compute in your browser cost their operator almost nothing per use — so they can stay free, without caps. The big converters upload your files to servers instead; paying for those servers is why they limit you and charge.

evidence: 3 numbers · 4 sources →

2026-09-06 · ai · discovery

AI search does not read llms.txt (yet)

97% of published llms.txt files get zero real fetches, and no major AI search engine reads them (Ahrefs, 137,210 domains, 2026). Publish one anyway — coding agents do fetch it — but never design a site around it.

evidence: 3 numbers · 3 sources →