Let's start with the hardest problems, those challenges that at first blush seem impossible.
Basic physics dictates that the first method is impossible without the use of heavy pharmaceutical aids, which is not encouraged.
Because the first is virtually impossible in the short- to medium-term and unlikely in the longer term, immigration would appear to be the solution of choice.
At first it is almost impossible to believe that one person is causing all of this trouble.
"Renegotiating the Lisbon Treaty is first of all legally impossible, " he said.
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Because, again, since no one knew which mortgage would default first, it was impossible to assign a specific mortgage to a specific bond.
First, it is impossible to fully test any computer system.
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Though some fundamentalists appear to believe that the Bible was written in English, for the more thoughtful (or pious) Christian, serious study of the New Testament or the early Christian church is impossible without first knowing alpha from omega.
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The first is that it is impossible to find a single measure of poverty.
At first, it was almost impossible to detect but easily correctable.
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For the 15, 000 or so Chinese men who had come to build Canada's transcontinental railway and the many more that came thereafter, it became first prohibitively expensive and then impossible to send for their wives and children.
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The stylus transmits a signal that easily allows users to track down its location, making this the first pen that's nearly impossible to lose.
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First, they say legal immigration is impossible to control because we're a member of the European Union.
Talk about going from worst to first--the numbers are almost impossible to believe.
During the first phase right after the earthquake it was impossible to promote Japan because of the significant damage.
In 2004 everything seemed to be impossible, but in 2005 the first YouTube video was uploaded and Facebook had just been launched, evolving from its early beginnings in a Harvard dorm room.
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It is technically impossible to effectively attack an enemy without first obtaining actionable intelligence about the enemy.
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The first lesson of Enduring Freedom is that it is impossible to know with certainty when and where new challenges will arise.
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His exceptional career, chronicled in a first-rate biography, Insisting on the Impossible, demonstrates both the strengths and weaknesses of a founder-driven culture.
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The unit did kill six penalties, Lundqvist made 29 saves and fans heckled Sidney Crosby, but New York was shut out for the first time this season, and it's impossible to win if your team can't score a goal.
But utility service outages are a standard part of life in such nations and so it may be impossible to tell, at least at first, whether outages near the first of the new year are related to the year 2000 computer glitch or just a normal daily event.
It is now impossible to talk sensibly about this subject without first grappling with Mr Kaplan.
He said they had looked throughout at the difficulties created by the structure of the legislation but it was impossible to pre-empt the outcome without first knowing the "shape of the evidence".
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But since riddles and thought experiments rely on imagining impossible realities, by choosing a riddle in the first place, the Rabbi is paradoxically introducing the young man to the value of magical thinking as well.
As in 1996, in the first election following Rabin's assassination, it is not impossible that the disappearance of a tough leader of the centre will make way for the return of a coalition led by the Likud.
At first, visualising an invisible substance of unknown composition seems like an impossible task.
On first blush, the phone looks so ordinary that it's impossible to tell there's a radiation meter within.
First, let's point out that this is a mathematically impossible feat.
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This was to allow them to qualify for the first intake into the single currency, an achievement many pundits considered impossible given the country's past extravagances.
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