be uncertain

Harris’ team was expecting the results to be uncertain up to days after the polls closed, the aides told reporters.

Earlier this week, Helen Miller of the Institute for Fiscal Studies told the BBC's More or Less programme: "There is not just a nice anti-evasion/avoidance button you press... you have to do lots of policies and it will be uncertain, and you won't find out for years how much money you are going to get in."

Without a transplant, Destiny's future would be uncertain, other than lots more dialysis.

Lucy’s status as a human ancestor may be uncertain, but in other ways she is coming into sharper focus.

In 1814, LaPlace declared that if it were possible to know the velocity and position of every particle in the universe at one particular moment — and all the forces that were acting on them — “for such an intellect nothing would be uncertain, and the future, just like the past, would be the present to it.”