Decision proof
Evidence registry
One index of what this Event Project knows, how it knows it, and what downstream work relies on it. The canonical evidence class never erases the source system's own vocabulary.
Not a confidence score
Documented, declared, computed and patterned describe provenance. They are not synthetic percentages.
Unknown stays unknown
A value can exist while its provenance is missing. Atmosphere does not upgrade that value to documented or measured by inference.
Native basis survives
Venue confidence, Production Ledger basis, rental quantity basis and planner declarations remain visible beneath the normalized class.