And no one knows whether it's the total level or the peak that causes health problems.
However, smoking rates are still climbing, and no one knows when they will peak.
And no one knows for sure -- not even the dueling Upper West Side mothers.
In addition, the CDS market is not transparent, and no one knows where the CDS obligations lie.
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Brazil's art and fashion scenes are blowing up, and no one knows it better than Carlos Jereissati.
No one is quite sure why this might be and no one knows if it will last.
The Germans are now openly talking of fiscal union and no one knows how far that will go.
We still have the fiscal situation to deal with, however, and no one knows how the markets will respond.
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It is likely to reopen in stages, and no one knows when it will be fully back in service.
And no one knows how much more Saudi Arabia can churn out now.
And no one knows how the new market in tradable subsidy entitlements will work, or the effect on land prices.
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But his music demands to be heard as it was written, and no one knows this better than Professor Levi does.
Four years is a long time away, and no one knows how any of this will play out -- which I think is a good thing.
Although the jury is still out and no one knows for sure, the competition is now being played out in construction sites all over the country.
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Companies like Vizio who have entered this cutthroat market and excelled have done so on price, and no one knows price better than Wal-Mart.
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In short, the divisions in Washington may grow even deeper in the near term, if that is possible, and no one knows what will actually be accomplished.
Of course, the loss of patent protection for Lipitor is one issue, and no one knows how well their pipeline drugs will be able to pick up the slack.
Research has identified at least six possible growth-inhibiting proteins in the spinal cord, and no one knows how many need to be turned off or which ones are most important.
Right now there are tremendous opportunities in healthcare that will come to fruition in the next decade that you can buy at cheap valuations because the market overall is weak, and no one knows how Obamacare will unfold.
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' And so no one knows how to program this piece, but it is very beautiful.
"It does make me wonder if this has happened in the past and no-one knows about it, " he added.
For every Super Bowl winner, there is a loser, and perhaps no one knows this better than Andre Reed.
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And certainly no one knows whether it will result in economic Armageddon or a small blip on a trader's computer screen.
Easier too, you'd have to say, if you're working quietly in your back room and no-one knows what you're up to.
Most markets are now hostage to the fiscal cliff debate as it is now risk on or risk off at any moment and no one really knows how the situation will turn out.
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Even so the bet must be that the Greeks reluctantly, sullenly, will go along with new austerity but I have sensed a despair that last year just wasn't there and no-one knows where that will lead.
And while no one knows who will actually pay for the new projectors, estimated at four times the cost of current models, the digital revolution could reverse the fortunes of the overbuilt, financially strapped American theater chains.
And while no one knows yet just how the current contenders have been spending their cash these past few months, a quick look back at expenses for the first quarter reveals where they placed sizable chunks of money early on.
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