Source hierarchy
- Current legislation, government guidance, official standards and original documentation.
- Primary research and relevant systematic reviews with visible methods.
- Professional or scientific organisations with clear responsibility.
- Transparent industry research and reputable reporting as context.
Search snippets, aggregators and AI output are discovery aids, not final evidence.
Claim-level checks
The editor opens the source, confirms that it supports the actual wording, records the access date for changeable guidance and narrows the claim when the evidence is narrower. A source about US standards is not silently applied to the UK. A study of two formulations does not establish a universal rule for all gelato.
Information that can change
Regulation, official guidance, venue information, ingredients, prices and commercial practices require a dated check. London SAM currently avoids venue listings because no documented fieldwork or maintenance process has been supplied.
Research limitations
Sample, formulation, temperature, duration and outcome measures are stated when they materially affect interpretation. Association is not described as causation, and an experimental result is not expanded beyond the tested conditions.
External links
Links point to the supporting page or record rather than a search result. A working link does not guarantee that the source will remain unchanged; change-sensitive pages should be reviewed against the source before a material update.
Errors and disagreement
If reliable sources disagree, the page should describe the difference and avoid false certainty. A material error is corrected in the article, and a note is added when the change alters the reader’s practical understanding.