Sentence examples for are impossible to know from inspiring English sources
How much time has passed, who has been where, and why, are impossible to know.
The attainability of his deficit reduction targets are "impossible to know unless you start to describe what kind of cuts are really required," said Maya MacGuineas, president of the Committee for a Responsible Federal Budget, who supports the ambition of the budget but faults its partisan tilt.
But how to characterize a search engine's vast catalog, not of what an individual bought, rented or subscribed to, but merely what he or she was curious about — perhaps only for a moment in time — for reasons that are impossible to know?
But for most businesses, these critical numbers are impossible to know.
These things are impossible to know.
What changes the world will see in Iran are impossible to know at this point, but by Majd's account, many already consider the Khamenei era to be over.
It is impossible to know.
It's impossible to know, of course.
It's impossible to know for sure.
It is impossible to know for sure.
