Evidence strength
Know what the record can support.
Every figure carries how it was confirmed: observed locally, corroborated across sources, or independently supported.
Three strengths
Observed locally, corroborated and independently supported are kept apart on every figure.
Coverage, not a score
Strength is stated as a share of the record, with the period it covers.
Insufficient is an answer
Too little corroboration returns exactly that, never a smaller number.

