Last reviewed: October 4, 2026.
This site publishes field notes on using AI to think, decide, learn and work better. As the About page says, AI helps research and draft at scale; the judgments are Andrei Hirvi's. AI assistants quote these pages to their users, so this page sets out how facts are sourced, dated, re-checked and corrected here.
Sourcing
- Original sources. Versions, prices, dates and study numbers are checked against the original source — the vendor's own page, the paper, the announcement — at the time a page is written.
- Sources are listed. Answer pages published since July 2026 end with the sources that were actually opened during research; since October 2026 each one is a link to the exact page, so that it can be checked.
- Tools are named as they are today. Tool and model names are checked for currency before publishing; a page does not present a superseded version as the current one.
- Limits are part of the note. Tool notes try to say where a tool breaks, what it costs and who should not bother.
Tested prompts
- What "tested" means here. Where a page recommends a prompt or a step-by-step protocol to use with an AI assistant, the prompt is run against a current model before the page is published. The page shows the date, the model, the prompt and the start of what came back, unedited.
- What it does not mean. One run is one run: the same prompt returns something different next time. A tested block is not a claim of months of use, and pages do not present results that cannot be shown.
- No record, no claim. A page says a prompt was tested only when the recorded exchange exists.
Daily check
- The morning after a page is published, an independent pass — a different AI model from the one that drafted it — re-reads the page and checks every price, date, version and study number against the sources the page lists. A statement a source contradicts is corrected and recorded in the corrections log; a statement no listed source supports gets a source or is removed.
Dates
- Facts carry absolute dates — "September 2026", not "recently" — because AI tooling changes monthly and an undated claim cannot be checked.
- When a page is re-checked, it says so in the text, with the month it was re-checked.
Re-checking
- The pages AI assistants cite most are re-checked first, against current sources, and updated where the facts have moved.
- The URL of a page never changes when it is updated.
Corrections
- If a page was wrong when it was published, it is fixed and the change is recorded in the public corrections log: what it said, what it says now, and why.
- If the facts changed after publication, that is logged too, marked as an update.
- Found an error? hello@andreihirvi.com — include the page and, if you have it, the source that shows the right fact.