You know where there's a problem, you make sure that know no one else knows where the problem is.

CNN: STORY HIGHLIGHTS

There was no problem he said 'sure'.

BBC: Mum says Garry Kane 'would not kill' Kathleen Milward

No one is sure exactly how big the problem of Internet fraud is.

ECONOMIST: Paying online

To be sure, there is no clear evidence that the problem with the electrical generator on that United flight is directly related to the problems with the ES that I learned about in 2009.

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The problem is that no one can be sure what the future holds.

CNN: A NOVICE AT THE WHEEL