unattainable

Critics say they are often doubly flawed: overly expensive if targets prove easier than predicted; and counterproductive if the targets become unattainable and executives see little reason to stick around.

"But for it to become truly sustainable, there would need to be a profound change in production," she told AFP, adding that the industry continued to sell "an unattainable ideal".

Underground testing, though, is sufficiently difficult to detect that a comprehensive nuclear-testing treaty remains unattainable.

Speaking to Cooper, Paul said she once thought the “Bachelorette” gig was “unattainable” and shared how she thinks she landed the part.

The opposite is true: Only by showing — proving — to Russia that its demands are unattainable will the U.S. persuade the Kremlin to consider meaningful negotiations.