Reason and duration irrelevant. A sign could be that all flights are cancelled, diverted, and delayed across the state, but likely there will be an announcement due to weather/ war/ instability/ etc. Only states with two or more international airports count, otherwise this trivial.
Resolves YES if every one of a US state's international airports are shut down at the same time, beyond regular hours. Nightly closures don't count. Smaller private and business airports don't count.
Resolves NO otherwise after close.
1,000Wouldn't for example the New Orleans airport closing due to a hurricane meet the criteria? And doesn't that sort of thing happen most years?
@mariopasquato Nebraska, Arkansas, Delaware, Idaho, South Dakota and West Virginia ; I believe.
@SirCryptomind Given that applying the universal quantifier on the empty set yields true then these states already shut down all their international airports. But I see you are asking that there are at least two airports…