Whether Cheney really believes the insurgents are on their last legs is impossible to tell.
It is impossible to tell based on the limited amount of data Lilly has provided.
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It is impossible to tell how many such Chinese farm villages have been set up in Russia.
It is impossible to tell who benefited from the warrants, because all of these transactions took place offshore.
It is impossible to tell at this point whether this current market action is a sign of a longer-term trend.
But it is impossible to tell how much of the employment growth at these kinds of firms relates to a particular industry.
But many patients who were randomly assigned to one treatment opted to get the other instead, so it is impossible to tell which option was best.
Quite how many, however, is impossible to tell: because most such treatments are still unregulated, no one knows how many people are either providing or receiving them.
It is impossible to tell exactly at what price Porsche built up its indirect 31.5% stake in Volkswagen, which it hopes to use as a springboard for a full takeover.
The rest should be made to publish clear accounts: with all the cross-subsidies and loan guarantees that chaebol subsidiaries give each other, it is impossible to tell which is bankrupt and which is merely wobbly.
And, in a world where it is impossible to tell where work stops and personal lives begin, their owners feel entitled to stick them deep in the corporate network, loading them with all sorts of proprietary data.
Since Cutler provides estimated ranges for overall job changes, but specific numbers for each industry (except health care), it is impossible to tell whether he offsets the purported job losses in some industries with the job gains in health care.
Menasche's initial trial of the method on ten patients showed tantalizing hints of efficacy, but because there was no control group, it is impossible to tell whether the improvements seen were due to the cell transplant or to the bypass surgery the patients also received.
Cotton-industry officials say it is virtually impossible to tell organic cotton from the ordinary kind.
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"Whether these witnesses have actually been tainted or not is almost impossible to tell, " Brinkema said.
Unfortunately, the massive amount of oil continuing to spew out of the pipe obscured it from view, making it impossible to tell whether the company's latest attempt is having any success.
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