Some run in families, but most appear without warning and with no clear cause.
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There was also "clear cause for concern" over Iranian nuclear intentions, the MPs said.
As you say, we have no clear cause and effect indication here.
But regulators investigating the causes have yet to identify a clear cause.
Robert Harrison, the hospital's director of performance and delivery, said there was no one clear cause for the rise in patient numbers.
And the baffled doctors, he says, unable to find a clear cause for the problem, tend to assume that it is all in the mind.
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Coroner Dr Shirley Radcliffe said she decided on a narrative verdict because she was not able to find any evidence for a "clear cause" of death.
No clear cause appears to have been discerned yet, with some commenters writing the issues have evaporated, while some say battery life has been cut in half.
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This case and a separate and still pending appeal over police intrusions into homes and cars could have a far-reaching impact on when a person's private contents can be subjected to a search without clear probable cause or a valid warrant.
The airport said only prolonged snow, leaving them unable to keep the runway clear, would cause any trouble.
Reason: Enviros have blocked permits in prime watersheds where clear-cutting would cause flooding and erosion.
It is not clear whether deleveraging will cause more inflation or a deflationary depression.
And the message that we send in the midst of these storms must be clear: that our cause is just, our resolve unwavering.
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But he is stepping down, and it is not clear who might champion the cause in the new leadership that takes office in November.
"The really successful charities combine raw passion for their cause with a clear-eyed view of where they will get the greatest return on their fund-raising investment over the long term, " he says.
In my experience it is never clear cut what the exact cause is, in fact the physician who dealt with me when I started to suffer said that in only 10% of cases was the real cause ever discovered.
How can a prosecutor show that a leak "has caused or will cause significant, clear, and articulable harm to the national security" (Requirement 6), without first having to offer evidence to a judge that will reveal even more classified information?
And we made clear -- when either side does something unilaterally that we believe is counterproductive to that cause, we make our opinions clear about that.
It is clear that high doses of radiation cause an increase in cancer.
Whatever the cause, it is clear that Murdoch and Chernin have now invested a great deal of the company's future in DeWolfe and Anderson, who still run MySpace.
"It's not clear what's going to cause them to increase their spending in the short term, given the uncertainty in the economy, " said Dell's chief financial officer Brian Gladden.
Talks are complicated by the fact that -- unlike the ozone layer, in which it was clear solar rays that got through cause cancer -- climate change's health effects are generally indirect.
If your project has a clear message and supports a good cause, you will probably be targeting the consumer base that Causes.com already has, whereas a general site might not garner as much attention to your specific project.
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Whatever the cause, it is clear that the egregious acts of dishonesty that destroy careers (and in many cases have destroyed entire organizations in their aftermath) have been generally executed by people who hold the most senior roles in their firm.
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They also absorb pollutants that can cause algae blooms and help clear the water.
The no vote, in short, was not a clear-cut rejection of the nationalist cause.
As a result, it's not clear whether Mets fans have as much cause for celebration as Wilpon and Katz did Monday.
Its purpose is clear and simple - to establish the cause of death of the seven people who died within the house.
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