1The aim is not to work out the answer. It is to keep moving while the answer is missing, and to find that the fear does not have to run the day.
When something is unsettled, your mind hands you one job after another: replay it, check it, decide what they really meant. You can put those down and still get through the afternoon. Set the bar there for now, at carrying on without the matter being closed, and notice afterwards that the not knowing did you no harm.
Islamic evidence
Everything to do with this affair is in God's hands (Quran 3:154). You are allowed to stop needing the full picture, because holding all of it was never your work.
“After sorrow, He caused calm to descend upon you, a sleep that overtook some of you. Another group, caring only for themselves, entertained false thoughts about God, thoughts more appropriate to pagan ignorance, and said, ‘Do we get a say in any of this?’…”
Qur'an 3:154
Psychological evidence
Across four experiments, being provoked led to more aggressive behaviour, and part of how it did so was by feeding angry rumination and draining self-control. These were laboratory provocations with volunteers, so the effects are modest and the setting is artificial. Still, the useful part holds: going back over it is not a neutral act, it is one of the things keeping the anger within reach, so declining to solve it is doing something rather than giving up.
Denson TF, Pedersen WC, Friese M, Hahm A, Roberts L. (2011). Personality & social psychology bulletin · doi
Review detail
Why it works. Chasing certainty keeps the whole scene switched on in your head, and leaving it open lets your body come down on its own.
When not to. If what is unresolved concerns your safety or someone else's, that one needs answering rather than tolerating.