Yahoo said it did not know for sure that the file had been taken but told AFP it could not "deny the possibility".
Except for a comment about having scouts around the country, Deb and Rob do not know for sure how they were chosen to get that letter.
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President Obama did not know for sure that Osama bin Laden was in that compound in Pakistan when he ordered the Navy Seals in.
Until more stringent studies document what effects acupuncture might have on the sneezing and sniffling of allergies, however, you may not know for sure whether those sessions under the needles are likely to do you any good.
Although it's not known for sure how much benefit a surgical mask has in preventing the transmission of swine flu, people who have the illness may consider wearing one as a way to reduce the amount they cough and sneeze onto others, said Dr. Arthur Reingold, head of the epidemiology division at the University of California, Berkeley, School of Public Health.
Not chump change for sure, but way, way less than what one would expect the bride of a billionaire to to spend.
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Dr Jaisson suspects, though he has not yet proved for sure, that all the ants in the colony are genetically identical like the cells in a single human body.
"Until we get this guy in handcuffs, we're not going to know for sure, " said Mr. Smith.
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That is not a recipe for making sure that we are taking advantage of the opportunities and meeting the challenges of the Middle East.
And for sure not-quite-grown-up "adult" males often have issues with learning to be responsible for their share of things - like maybe sometimes the problem is with the guy?
She's not for the timid, that's for sure.
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Yet a survey for the ABI found that half of those asked were not sure how they would pay for these care costs.
Likewise, Cole has scored 10 times for England, has more than 50 caps for his country and has been to two World Cups, but I'm not sure that will count for much in Capello's eyes.
Now, if we truly believe that education is the key not only for opportunity but also for making sure we can compete in this 21st century economy that is not a tolerable situation.
He said he believed everyone had been accounted for but could not be sure.
Not a bad list, for sure, and nonprofit models seem like an inevitable outcome for at least some primary-source reporting.
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It's not that easy to say for sure, but the Item Club economists suggest it might be explained by sectoral changes in employment.
Really, I will not be signing that, for sure.
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But, not in a hurricane, for sure.
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"There was not enough thrown at Hiller, for sure, " Detroit defenseman Niklas Kronwall said.
And no one knows for sure -- not even the dueling Upper West Side mothers.
But Mr Geithner will not ask for it until he is sure he needs it.
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The educated, well-informed Europeans I met were not entirely sure what Obama stood for.
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