They must also be shrewd -- and that's no easy task in a crisis terrifying enough to cause almost anyone to lose his or her head.
Although they acknowledge that they cannot win militarily, they have shown themselves to be shrewd, and this week hardened their position publicly before getting down to business.
They appear to be shrewd investors.
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Setting out precisely who is a friend and who is a foe has often proved to be a shrewd political tactic.
In some ways, Mr Webb would be a shrewd choice.
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The CEO of Goldcorp, Robert McEwen turned out to be a shrewd goldbug, turning his modest ownership in the micro cap Goldcorp into a large stake in US Gold .
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Sam Nunn would be a shrewd selection for secretary of state is partly rooted in Nunn's prestige, high enough to protect the president elect from domestic lobbies in foreign policy battles soon to engulf his administration .
Such a statement may be sincere or shrewd or both, but at a minimum it casts doubt.
Those cancellations could be explained by shrewd bargaining tactics rather than slumping demand.
The further lesson is that businesses do not need to be as instinctively shrewd as Howard Cosell in order to do so.
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With Dalglish, 59, out of top-level football management since he left Celtic in 2000, Clarke's appointment will be seen as a shrewd move.
He should pay a reasonable wage, charge a fair price, and be decently restrained in the way he spends his profits (which, the shrewd Islamic economist points out, ought to be good for investment and healthy counter-inflationary).
The L.A. Times has a profile of Lazarus today that paints him as a shrewd negotiator who might be able make a profitable deal for the next Olympics.
But the dispassionate application of law happens, in this case, to be the right policy as well as the shrewd one.
The youngest CEO to have a company ranked in the Fortune 500, Mr. Dell has a long history of shrewd leadership, but this may be his most genius move yet.
But the overarching task is to be fair, just, compassionate, ethical, and shrewd, all at the same time.
Just as women can be brutally unfoolable about other women, most men have a shrewd instinct about other men's reliability.
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Expect to hear more about these shrewd but superstitious brothers (they consider 13 to be their lucky number and won't fly together).
Margo will be sorely missed by the Center for Security Policy family for her wise counsel, shrewd sense of tactics and strategy and generous friendship.
The added shares, coupled with Wasserstein's hard-won reputation as a shrewd negotiator capable of extracting the maximum value in any deal, may also be weighing on the stock.
It is not obvious that a "kinder, gentler" Republicanism will fare well in the primary process come 2016, but it is a shrewd way to differentiate oneself from a primary field in which most challengers will be competing to demonstrate their conservative bona fides.
This is shrewd because a big objection from incumbents has been that the effects of market opening are unknowable and could be disastrous.
The move could be seen as an extreme sign of Carrey's faith that the movie will actually make money, or a shrewd move by the studios to get the struggling actor for nothing.
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