Source policy & evidence types

Updated October 5, 2026. Our aim is to make every important conclusion traceable without giving uncertain information a false appearance of precision.

Use the source that fits the claim

Exact-model facts should come from the manufacturer’s exact product page, specification, installation or owner’s manual, warranty or accessory documentation. Government and safety sources support their own guidance. A local authority supports only its stated jurisdiction and scope. Industry guidance and editorial interpretation are identified separately.

Preserve conditions and disagreements

A sound number needs its operating mode, distance and other stated test conditions. Consumption is tied to fuel, units and load percentage. An ATS package is a distinct configuration. A newer source does not automatically erase a conflicting specification: unresolved values are withheld or shown with an explicit conflict note.

Unknown is a useful result

A missing field means the evidence has not established it. It does not mean that the feature is absent. We do not fill a model’s blanks from a neighboring model, dealer copy or a brand-wide assumption.

Dates describe the work done

Source-check dates record when the linked material was examined; they are not manufacturer revision dates or professional approval dates. Original publication dates that were not retained remain unrecorded. A page edit does not imply every old source was reverified.

Professional review is a separate event

Technical professional review pending. No licensed reviewer is currently recorded. Future review records require identity, credential evidence, jurisdiction, scope, date and the reviewed version. See the review process and correction policy.

Funding and corrections

Read our funding disclosure. Send a source-specific correction through contact; include the page, claim and supporting document. Manufacturer documentation is evidence of a published specification, not independent reliability testing.