It's true that the strike happening on the 21st closed the book on the Polymarket resolutions for the 19th and 20th, but the absence of military action on those specific days was already plain to see.
Historically, we've always looked at what actually happened, or didn't happen, on a given date to understand the record.
The playbook has long been that if nothing occurred, then nothing occurred; a later event, like a final pay stub, doesn't change the fact you weren't working two weeks prior.
It seems a bit like saying a later storm defines that it didn't rain last week, instead of just checking if it rained last week.