The company said it believed the malware was state-sponsored but it could not be sure of its exact origins.
It also concluded that discussions with the final purchaser were " very informal" and it could not be sure the final sale was "a good deal".
Rhondda Cynon Taf County Borough Council in South Wales said the main problem was that it could not be sure enough staff would be able to get to the schools to ensure the safety of pupils.
Notably, in the case of North Lakelands NHS Trust the CHI team concluded that it could not be sure that the problems of abuse of patients and failure to act on complaints would not be repeated.
It would take many years for Sky to recoup the forgone revenue from refusing to sell its sports channels wholesale to rivals by picking up more retail subscribers itself, and it could not be sure of ever doing so.
Chorion, the company that controls Blyton's estate, said it could not be 100% sure about the differences between the picture book and the novel because they both "pre-date our acquisition of the Blyton Estate".
Powerful as it was in places, that manuscript, published pretty much as he had left it, was pitifully incomplete and nobody could really be sure how Pasolini would have brought it to completion.
Such was the level of humor that when he sang of his love's beauteous cheeks, you could be sure it wasn't her face he was fondling.
Sure, it could be made into items for adornment and decoration, but the value of those items varies widely with the trends.
"Sure, it could be live fish and it also could be these other things, because we tested them and looked at the evidence, " Baerwaldt said.
Argentine politics were inherently unstable - the IMF could never be sure who it was dealing with or whether they would stick to agreements.
Maybe, maybe not, but with the barn door open that wide it sure seems like you could be gluten intolerant and just not realize it, right?
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Even if it could be agreed, I'm not sure that a bank levy to extract 30bn euros from the financial system, in the name of "private sector burden-sharing", really fits that description.
The reasoning was that Germany would help countries get out of the mess they are in, once she and the German people could be absolutely sure that it wasn't going to happen again.
There's no way for you to know if that's the case, but knowing that it could be is another reason to shop around to make sure you're getting the best possible deal.
It sure would be helpful if we could hire people to repair 70, 000 bridges, establish pre-nursery schools for every 4 year old kid, attack the environmental problems that emanate from global warming, and welcome valuable immigrants from around the globe.
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Mr Justice Nicol said there was "no pathological evidence that Tia had been sexually assaulted, but it could not be excluded...so I cannot be sure from these features either that the photograph was taken after Tia had died".
BBC: Sentencing remarks on Stuart Hazell from Mr Justice Nicol
The railroads were interested and would guarantee delivery in five days, provided a couple of things: That the train ran at least once a week, so the railroads could be sure that the cars and locomotives it dedicated to the service would be used regularly, and that Pollak deal with loading and unloading the delicate goods.
If the US can increase production by 25% within the decade, could the world?? I doubt it, but we cannot be sure, because there are bound to be fields in other countries ripe for exploitation with the same technology.
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"It would be nice if you could do that but I'm not sure it would work - it depends whether it is a simple mechanical component or something more complex, " Prof Pillinger, who now works at the Planetary and Space Sciences department at the Open University, told BBC News.
He said it looked like they could have formed a suicide pact but he could not be sure "beyond all reasonable doubt".
To be sure, Saudi engagement in Iraq carries great risks -- it could spark a regional war.
Barclays Capital analyst Blayne Curtis points out in a research note that while it is too early to be completely sure what will happen, the recent developments could cause bottlenecks for PC producers.
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Sure, those may be some extreme hypotheticals (although Cole says it could very well happen), environmentally minded businesspeople should heed the lesson here: You can be an activist or you can be a businessman, but if you decide to be both, you might want to think about hiring a good lawyer.
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That solemn responsibility is shared by us as human beings, by us as Americans, and by us as men and women of the Department of Defense, who could be asked, when the time comes, to act, to make sure that it never happens again.
Speaking to BBC News earlier this week, he said "it would be nice" if he topped the charts, but admitted he was not sure if he could do it.
The investigators suggest that the consenting process could be beefed up by making sure all staff, including researchers, receive guidance on how to do it.
It sure would be nice if the world had a decentralized peer-to-peer digital currency that could be transferred to mobile devices in a secure fashion.
Sure it is conceivable that both parties could hurriedly work out something in this period, but would it be a truly viable compromise or a solution that we would come to regret over time?
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