Every technical statement must show its source.

A clear evidence label is more useful than a confident score. We separate public information, controlled measurements, and on-site observations so buyers and agents can judge each conclusion.

Version 1.0 · Last reviewed July 21, 2026

Evidence levels

1. Public information reviewed

Facts are taken from named manufacturer pages, manuals, or other attributed public sources. We normalize terminology and identify contradictions. We do not imply that the product was handled or measured.

2. Lab measured

A result can use this label only when the sample identifier, sample source, procedure, equipment, conditions, and observation date are recorded. A single sample cannot prove production-wide quality.

3. On-site use observed

Workflow, ergonomics, and durability observations are tied to a defined job, operator context, and period of use. On-site observations stay separate from controlled measurements.

Product-page requirements

Evidence level and hands-on status.
Exact model or variant, when confirmed.
Source list and last-reviewed date.
Sample source and commercial relationship.
Known limits, contradictions, and unanswered questions.
Who should not choose the product, once evidence supports that conclusion.

Scores and rankings

We do not publish a numeric score until the relevant protocol and evidence are available. Category winners must be tied to a use case. Payment cannot buy a score, ranking position, or the removal of a supported criticism.

Supplied products and affiliate links

If a manufacturer, distributor, or other party supplies a sample, loan, travel, data, or payment, that relationship will be stated on the affected page. Future affiliate links will be marked close to the link. Editorial conclusions remain ours.

Corrections

Readers and manufacturers may submit a correction with a primary source through the research request form. Material corrections will change the page and its reviewed date. We do not silently present unverified supplier statements as facts.