unknown

Its 2024 debut report revealed hundreds of previously unknown UAP incidents, but found no evidence that the U.S. government had ever confirmed a sighting of alien technology.

From Los Angeles Times ● Oct. 23, 2026

That’s an equation that incorporates educated guesses, considering that future tax rates are unknown, but the best she can do is project the current system through future years.

From MarketWatch ● Oct. 23, 2026

The whereabouts of the Salvadoran team of aviation technicians who were part of the U.N.-backed Gang Suppression Force remain unknown.

From The Wall Street Journal ● Oct. 22, 2026

There seems to be a real fear of the unknown because we are often unsure what happens on the other end once we click "apply".

From BBC ● Oct. 22, 2026

If I disable the tracker and find a place to hide my heat signature, they might assume I just fell victim to some unknown new planet danger.

From "The Last Cuentista" by Donna Barba Higuera

There are any number of unknowns, but one thing is clear: A majority of the justices ruled that mifepristone access should remain unchanged during litigation in the case.

From Slate ● Sep. 16, 2026

Recent warnings about the potential dangers of AI show that there are significant unknowns with such a rapid growth of a new industry.

From BBC ● Sep. 15, 2026

AI’s effect on the economy and monetary policy will depend on a wide range of unknowns concerning which sorts of firm prove most profitable, how AI affects employment, and other factors.

From The Wall Street Journal ● Aug. 28, 2026

Phil Dudamel one came with considerable risk and unknowns.

From Los Angeles Times ● Aug. 12, 2026

He was the chief of the disease-assessment division at the Institute, the doctor who dealt with the dangerous unknowns.

From "The Hot Zone" by Richard Preston