How an edit is processed
The edit arrives naming the field and the new value and lands in a queue with a diff: an editor sees exactly what changes and on what grounds. Acceptance updates the data recalculation date.
A note on boolean flags: «unknown» and «no» are different values to us. If a feature is absent, the flag is set to no explicitly; if we could not verify it, the table shows a dash. An edit that turns a dash into a no is as useful as one that turns it into a yes.