Our editorial method and sources
We explain the criteria behind a choice and the evidence that supports the context. Our guides use AI assistance and documentary checking; they are not claims of physical product testing.
Sources and scope
Cultural institutions and manufacturer references support the specific subject described. A general standard or another brand’s care instructions do not certify a product in our catalog. Original exercises and calculations are identified as our own.
English and regional editions
The US English guides are editorial adaptations, with local terminology and appropriate units. Spanish downloadable resources are explicitly labeled. Search topics are editorial hypotheses unless a dated research record contains a measured volume.
Products and updates
Product pages distinguish supplied information from our editorial summaries. Manually checked prices expire after 24 hours; official API metrics have their own freshness rules. We do not invent ratings, stock, licensing, tested performance or delivery guarantees.
Corrections
We review documented changes and corrections. An editorial review date does not establish Google indexing, a search position or a sale. Contact details appear on the legal and privacy pages.