Measurable directly
- Named or not — the product appears in the answer text.
- Linked or not, and where — your product page, another page of your site,
someone else's. In our records, when a seller's URL was present it pointed at the product page in 643 answers and elsewhere on the site in 1,445 (study).
- Fact match — a stated value equals the value in a versioned, sourced
record.
- Verified crawls — requests that passed the provider's documented check.
Each of these must carry the provider, the exact model name and the date.
Measurable only with design
- Change after an intervention — needs a frozen question set, a baseline,
the noise between two unchanged runs and a control group. The checklist is at /checklists/before-and-after-test-on-ai-answers.
- Which models favour which sources — needs the same questions across
models on the same days.
Not measurable from the outside
- Why a model answered as it did. The answer shows what it said, not what
it read or weighed.
- Answers to questions you did not ask. Absence from your record is not
absence from the world.
- Revenue from a mention. A mention is not a visit, and a visit is not a
sale.
The ladder that keeps each claim on its own step is at /evidence.