It is not possible to know whether the information that was accurate is still accurate.
Thus it is not possible to know about "things-in-themselves" or about the ultimate causes of experience.
It is not possible to know all the variables acting on a measurement to determine the degree of error (uncertainty) of that measurement.
Unfortunately, it also contains a great deal of what is not possible to know, presented as if it were.
But, he added, it is not possible to know who the attackers are, and who might be behind them.
Walsh says it is not possible to know how widespread the bacteria now is in the UK.
Representative Henry Waxman, Democrat of California, said it was not possible to know whether the announcement's timing was being manipulated.
As the trailer was covered, it was not possible to know what, if anything, it was carrying.
"It is not possible to know the duration of these deployments and operations," the president's letter said.
If it is not possible to know where it vanished to, how can anyone know where it came from?
It's not possible to know.
