Little is being discussed in the press so it is hard to know what is going on behind the scenes.
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It is hard to know exactly what Sistani is thinking and planning.
What is more, it is hard to know how hedge funds actually fare, since indices that track industry performance tend to overstate the returns.
When will this discrepancy start to show up in reduced production?? Well, certainly this decade, but it is darn hard to know what year.
It's hard to know really, but what is clear is that we need to do something about it.
Moreover, it is hard to know what kind of option grant might deliver the best performance.
It is hard to know what impact the closing arguments may have, but experts say they can change minds.
But it is hard to know what else the spooks could have done.
It is hard to know what technologies will be around in two years, but you don't want to swap out everything.
But how Mr Obama handles this is critical, and it is hard to know what proposals or rhetoric would make his speech soar above the obvious, and into history.
It is hard to know what to make of the chapter on astrology, superstition that Ms Sobel appears to take seriously, and which shifts the tone of her book from thoughtful to flaky.
In the battlespace of the global internet, it is hard to know what effects a retaliatory attack might have on another country, and on those citizens and companies that might rely on internet connectivity or other critical infrastructure.
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"It's hard to know what the economy is going to be like in 20 years, " says Harriet Tregoning, director of the Washington DC Office of Planning.
It's hard to know what kind of reporter Janine is, since she seems to be writing newspaper-style think pieces for a TV network.
For "commercial reasons" Royal Mail says it does not release sales figures, and it is hard to know exact numbers, or what age group is buying them.
It is hard to imagine that she did not know what was going on.
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"It's obviously hard to know what the impact of an event like that is on the way that lawmakers and others in Washington approach other issues, " Carney told reporters.
"To the prosecution, it's clear what they're giving up, but less clear what the defendant is giving up, because it's hard to know how strong his claim of insanity might be, " she said.
So it's hard to know what our corporate and paper, you know, relationship is to his stance on affirmative action.
As an author myself, I know what a huge deal it is to finally see some rewards from all the hard work you put in!
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But returning some of the smaller items like invitations and tickets is difficult because they aren't unique and it's hard to know from what collection the material was taken.
While it may be hard to know exactly what role climate change has played in causing the drought, there is no doubt that these kinds of events are exactly what we expect to experience more frequently and with greater severity because of the changing climate.
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