The question this resource answers
Identify the type of evidence you are reading and record the proposition it can reasonably address. It is written for readers distinguishing kinds of product evidence, with the focus kept on evidence reading room. The aim is a usable record or calculation rather than another generic product-ranking page.
Gather the inputs before interpreting the result
The worksheet asks for: Source type: label, manufacturer, study, review or calculation; Exact proposition you want to check. Keep the relevant package, item reference or source document nearby when completing a field. If the source does not establish a fact, leave it unresolved rather than replacing it with a plausible assumption.
How the working is performed
Separate source type from source quality. A label can describe intended use; a study requires its own population and methods review; a calculation establishes only the arithmetic from its inputs.
Work through a concrete case
Customer feedback can describe reported experience. It does not automatically establish efficacy, and a general category study is not a product-specific test.
What the result cannot establish
The tool provides an editorial reading prompt, not an appraisal of a particular study or a clinical conclusion. Review the original item and source before turning a worksheet result into a purchase statement. A calculation can be correct while an input is incomplete, outdated or attached to the wrong product.
Retain a reviewable record
Keep the date, item identity and the source behind any product-specific statement. If you share an output, retain its assumptions and limitations alongside it. Use the interactive tool to reproduce the working rather than presenting an unexplained number or verdict.