Clock running out

[rwest]

Originally Posted by Cobra

There is a whistle. The official looks at the clock and it says 4:34. It continues to run and stops at 4:28.

The official isn't certain and sure of how much time should be on the clock?

In the scenario offered it was a count that was the definite knowledge. A human count is not going to be as accurate as a clock. So I shouldn't have said never but in the OP we don't have definite knowledge