When uncertainty is still ordinary cleanup friction
People-data uncertainty is still more ordinary when your team is clarifying likely duplicates, checking household relationships, or cleaning up obvious record inconsistencies without yet changing a real trust or merge decision.
Ordinary cleanup friction can be inconvenient, but it does not automatically mean the records are unsafe, the data model is broken, or the next step is already disproven.
When uncertainty becomes a real blocker
Treat people-data uncertainty as a real blocker when it starts weakening trust in who a record really represents, changing whether a merge still feels safe, or making the consequence of guessing too high to keep treating the issue as ordinary cleanup.
At that point the safer move is narrower review and clearer consequence handling, not more optimism or vague reassurance that the ambiguity will probably sort itself out.