These "Facts" are interesting. "Neptune Deep will start delivering natural gas in 2027." for example is not a fact, its a prediction. "On May 18, 2026, Ukraine carried out a drone attack on Moscow, Russia." is less of a fact and more of a litmus test for which sources of information you trust.
Indeed. Real-world claims are somewhat messy. Some of the standard benchmarks, e.g. the questions in AVeriTeC, share similar characteristics.
So, rephrase it thus:
"Russia, Ukraine, and multiple international news agencies reported that Ukrainian drones targeted Moscow on or around May 18, 2026."
There are rarely pure first-order "facts" in the mathematical sense. There are evidence-backed claims with confidence levels. That does not make it "just a litmus test". It makes it a probabilistic factual claim with varying confidence levels - and this one happens to be verified and unambiguous.