Black's team says it's not sure what sparked the rattail boom.
But there's this looming actor's strike, so it's not 100% sure that it's going to be made, but it's looking pretty certain.
Douglas Brinkley, a well-known presidential historian and professor at Rice University, says it's not sure that Obama would have won the Democratic nomination without Kennedy's endorsement and that noteworthy part of his speech.
I'm confident we can win this thing, but it's not a sure thing.
WHITEHOUSE: Remarks by the President at a Campaign Event -- Tampa, FL
Now that the establishment has succeeded in drawing in newcomers, however, it's not exactly sure what to do with them.
But the other part of it is it's not just making sure your kids are doing their homework, it's also instilling a thirst for knowledge and excellence.
"It's trivial to add to the operating system, but it's not trivial to make sure your applications don't look nice, " Brass said.
First of all, I would say that it's based on anonymous sources, so I'm not sure that it's true, and hopefully it's not because it reports that Speaker of the House John Boehner, in a closed meeting with House Republicans, called the discussion over whether or not to allow student interest loan rates to double a phony debate.
After 37 seasons at Syracuse, he's just not sure how long it's going to be before he decides to do something else besides coach the Orange, a team he's elevated to the top rung of college basketball over the past four decades.
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.
And while it is an issue, though, I'm not sure it's the top issue in a lot of individual voter's minds.
NPR: Immigration Issue Appears to Stall in Streets, Congress
It's a pokiness I really enjoy, to be sure, but it's also not the kind of Nashville songwriting that shows up in the current music of hit makers like Sugarland or Taylor Swift.
And I think that sharing the responsibility from the start when it comes to children and household shores will make sure that it's not only the woman's responsibility to look after the home and children when the children are growing up either.
"I pretty much avoided soy for 10 years after diagnosis but recently was told it was OK to have soy in moderation as long as I read the labels and make sure it's not the main ingredient in any food, " says Mulrain, who is currently being treated for a recurrence.
It's not that easy to say for sure, but the Item Club economists suggest it might be explained by sectoral changes in employment.
The yet-another-device philosophy doesn't carry, so to speak, and it's sure as hell not the future of mobile computing.
ENGADGET: Palm Foleo and Linux OS for summer is what Hawkins is announcing at D?
But he's not sure it would have done Mr Rajaratnam much good, since in the end he probably would have had to pay the insurer back for the legal fees.
While he's not sure it's really founded in anything other than the rumor mill, the fact that both sides have agreed to a full media blackout during this phase of the negotiations could be evidence of progress.
But asked whether the U.S. government should speak out, Piontkovsky says, he's not so sure it will help.
Carnival's contract prohibits a class action suit, but Hickey said he's not sure whether it is legally enforceable.
If you've been involved in any marketed scheme, make sure it's not the attorney who blessed the deal.
"On balance, I'm not sure it's the best way to do business, " said Ali Velshi, CNN's chief business correspondent.
Shaw now says that after some reflection, he's not absolutely sure it is.
I'm not sure it's actually been discussed in the briefing room -- Libor.
We have to raise the minimum wage and make sure it's not every 10 years, but it's keeping pace with inflation.
"I'm not sure it's a good thing to make a credit decision based on how many Facebook friends I have, " he said.
Moy says NSS will carefully screen customers to sell only to known companies and agencies, and will use encryption keys to make sure it's not selling to impostors.
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