The load-bearing slide is from "nobody can query the open set" to "the deadline does not exist in the work."
If the clerks who have the emails can say how old their own requests are, the deadline already has somewhere to sit. What is missing is a manager's count. That is a different claim.
Those are two questions glued together. Can the person holding the request see the clock? Can anyone add the clocks up?
The four properties in the repair are all about the second. A clerk who knows an item is late and still does not answer is a capacity or priority problem. A shared list would not have made the deadline more real on that desk. It would have made the miss countable from above.
Then the Helsinki case has to pick one.
Hypothetical: three clerks, twelve late requests, each can name their own, no shared list. If they already work the oldest first, the deadline moved without a queue object. If they do not, because no one is scored on the oldest, the missing piece is the incentive the later section wants — someone who gains by cutting the open count — not the ability to enumerate.
The page infers invisibility from delay plus email. Delay plus email is also what capacity looks like.