Even though your idea may be untested and you may not be absolutely sure of your business model, try it.
It has edged towards relaxation in a few recent 5-4 decisions, but the conservative wing of the court may not be sure of a victory in a broad-based voucher case, according to Jesse Choper, a law professor at Fordham University in New York.
You'll shatter the Republican base and not replace it with anything or not be sure of replacing it.
The company said it believed the malware was state-sponsored but it could not be sure of its exact origins.
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.
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.
If a polluted water sample contains a strain of E. coli that is not found in humans, you can be pretty sure that sewage is not the source of the pollution.
Although the court based its ruling on the suspect's school records, its headmaster told BBC Hindi that he could not really be sure of his age.
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Seemingly nonplussed by the arrival of large numbers looking for work and homes, the Tory ministers agreed action should be taken but were not sure of what form it should take.
The case ultimately fell apart after prosecutors decided they could not be sure about the credibility of the alleged victim, despite forensic evidence that showed a sexual encounter had occurred.
Not that they can be sure of answers: still officially a navy man, he is entitled to stay silent.
Smith, said he could not be sure Hamdan was the driver of one of the three vehicles carrying the missiles.
But of course he can't really be sure of that, not until his son has taken tests and shown some real progress in reading.
But they also want to be sure they do not run afoul of privacy laws in this and perhaps other countries by insuring their privacy policies are written with those laws in mind.
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When Carwyn Jones says the NHS will "collapse" unless it changes, he goes out of his way to make sure he's not seen to be questioning the commitment of those who keep it afloat now.
If banks are not making a lot of effort to court even the middle-class consumer, you can be sure the issue of serving the unbanked will not be addressed for a long time.
To be sure, this is not the view of a vocal minority.
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The end result of a debate such as what we experienced last week is that those not sufficiently afraid of Romney but still not sure they want him to be president will tend not to vote at all.
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If the lack of excess bleeding is really there--there's still not enough data to be sure--it may be the result of the way the pill works.
But I think you'd have to be very, very sure of yourself if you were to say that there are not going to be bumps in the road.
To be sure, choice of industry is not the only predictor of a startup's chances for success.
You can be sure that he does not take the strength of the nationalist vote at face value.
To be sure, Scroggin did not create the notion of controlling beyond the grave, something rich people have done throughout the ages.
So while some may envision the idea that the future looks to be coming up roses, I am not so sure of that.
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To be sure, not a (temporary) resurgence of the French as the arbiters of good taste, nor indeed a rise of the Americans.
The prosecution's case collapsed after pathologist Dr Andrew Davison, told the court he could not be sure Mr Reeves died as a result of the mistake.
And, if I'm honest (which I strive to be) I am not really sure what the price of Italian government debt is saying this morning.
The company says it does not actively police its users to make sure they are not breaking the rules - that would be impossible given the scale of the network - but relies on others reporting abuse.
To be sure, Republicans are not the only ones guilty of the politics of pander.
To be sure, not all school officials are in favor of limiting choice, saying teachers like the financial advice that commissions make possible.
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