It is impossible to say with certainty why justice was never done in Ms. Zhu's case.
No doctor interviewed for this story was willing to say with certainty that Natrecor was dangerous.
In fact, the one thing we can say with certainty is that we are wrong.
But he said that it would "need further development before we can say with certainty".
No one can say with certainty who will benefit by taking a certain drug and who will not.
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"If there's a switch from euro to drachma nobody can say with certainty what's going to happen, " she says.
But if you can say with certainty that environmentally your product is better, there can be a business advantage there.
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Idzik would not say with certainty that Sanchez will be in training camp with the Jets to even compete with Smith.
How can we say with certainty that any other interpersonal goals would not have trumped academic ones in a head-to-head comparison?
No one cas say with certainty at the moment how devastating or widespread the effects of an EMP strike might be.
Nor can we say with certainty what impact a medical condition will have on someone's life or how they might experience a treatment's side effects.
WSJ: Hartzband and Groopman on the Rise of the Medical Expertocracy
Gadhafi was a horrible man on his best day, but can anyone honestly say with certainty that future Libyan leaders will be a big improvement?
The one thing I can say with certainty is that we are going to need to see a stimulus package passed either before or after inauguration.
This might be mere myth, but one can say with certainty that the iris has always inspired with its fragile, velvet petals and long, slender stems.
"We can say with certainty that Ammar Harris is the suspect who fired the fatal shots, " Las Vegas police captain Chris Jones told reporters on Monday afternoon.
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There are very few things you can say with certainty, but one of them that you can say is that they will never pay back their debts.
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The one thing we feel we can say with certainty following these announcements is that we expect a radical resetting of price expectations going forward in the sequencing market.
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"Some of the skills required to operate were impaired in the study, but it is difficult to say with certainty how this would translate into real clinical performance, " she says.
And leading members of Congress with access to intelligence reports have said if nothing else Russian documentation is insufficient to say with certainty that nuclear materials have not been stolen.
Paul Vance, a spokesman for the Connecticut State Police, said officers didn't fire their weapons after arriving at the campus, but he couldn't say with certainty how the alleged gunman was killed.
No one can say with certainty how much influence it has on the main political groups, including the one loyal to Mr Sadr, on whom Iran's government seems to blow hot and cold.
Richard Bejtlich, the chief security officer of the firm hired to investigate, said that if each attack was viewed in isolation it was hard to say with certainty that China's military was to blame.
While no one can say with certainty what the future will bring to the radically altered Middle Eastern landscape, it is becoming increasingly apparent that US influence over events here will be dramatically diminished.
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"I completely accept nobody can say with certainty what the future for Afghanistan will be, but what I can say is that the future of Afghanistan will have to be determined by the Afghan people, " Mr Hammond said.
It is impossible to say with certainty how bad the 21st century's heating will be, but there is a large chance of it getting hot enough to do harm, and a far from trivial chance of things turning catastrophic.
But I can say with certainty that my administration -- along with our extraordinary troops and the patriotic men and women who defend our national security -- will do everything in our power to keep the American people safe.
While the committee says it is not possible to say with certainty what lay behind the trend "it is possible that the expenses scandal has had an impact on people's views and appears to have fed into and exacerbated the long-run trend of increasingly negative evaluations of politicians".
BBC: 'Steep' drop in public confidence in MPs, says watchdog
Whether they occurred inside the camp or outside the camp I cannot say with any certainty.
In Brazil, there is one bubble we can say with complete certainty.
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The only thing I can say with utter certainty is that come what may, my feelings for George Clooney will remain unsullied.
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