MDPE.18:3.3 - Build the source-to-claim table
Use a compact table:
| Source and retained part | Supported claim | Limit | Decision use |
|---|---|---|---|
| identified source object and relevant page, section, time span, track, frame, or data slice | the smallest claim the source supports | what the source does not show, competing explanation, uncertainty, or access limit | how the claim can change the named decision |
Separate observation from interpretation. Preserve the source’s position: practitioner self-description, participant testimony, institutional statement, scholarly analysis, platform record, archive metadata, or later reconstruction. Corroboration can strengthen a claim; repeated copying of one source cannot.
Source age and currentness depend on the claim. An old recording can be primary evidence for an old occurrence. An old teaching manual may be historical evidence but poor guidance for current safety, preservation technology, or SoTA Method. When current practice or effectiveness matters, seek current enactment and direct practitioner evidence rather than relying on official adoption or publication count.
State the epistemic status: observed, source-attributed, corroborated, disputed, plausible expert estimate, or unknown. Large prevalence measurements are rarely affordable; a bounded expert estimate can guide a reversible decision when its observations and uncertainty are stated.