Or you have more information the second time around, or you've thought about it and come to a different conclusion, or the circumstances are different, or...
In about 40 years of gaming I've yet to come across many instances where identical circumstances are repeated. Even similar circumstances are enough to justify similar but not identical rulings and resolutions. All trying for the perfect ruling for all time does is stop the game dead while the referee tilts at windmills.
Well, it seems rather pointless to try to do something you already know is literally impossible.