If they cannot, it is a good sign they have not fully weighed the implications of their venture.
At the Havana marina on Tuesday, the family showed no sign they knew a decision about their fate had been made.
So they didn't show any sign that they're shifting policy on that end.
Yes, EU leadership promised this action was a one-off event, but the fact that they had to make this promise is a sign that they no longer can be trusted.
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If the discomfort appears when they are talking, it might also be a sign that they are having difficulty shielding a sensitive issue.
When sellers put art up for sale at Christie's, they sign a warranty that they have clear title, although the auction house cannot guarantee that this is correct.
Instead of submitting their tax forms, they sign a letter stating what they need to earn to service the loan.
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The White House said the moves will curb abuses by schools that harass vulnerable members of the service until they sign up for programs that they sometimes can't afford and may not deliver what they promise.
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When users opt in to Chatroulette they sign a disclaimer saying that that they might be taped.
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Big markets, particularly America's, remain hopelessly fragmented, with little sign that they can be quickly and profitably consolidated.
Those results should be a sign that they need to do something quickly.
Their stated aim to build nuclear reactors is a clear sign that they recognize the danger of a nuclear-armed Iran.
That the Germans were now actively negotiating with the resistance was an unmistakable sign that they were getting ready for the end.
Many others who appear in Bruno have complained that, while they did sign consent forms, they didn't quite know what they were getting into.
Ancelotti did not make Ferguson's task any easier by selecting a strong Chelsea team - a sign that they will not relinquish their grip on the trophy easily.
Where others see a stop sign, they see multiple possibilities.
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Some 40% of the state's Latinos defied their leaders to vote for scrapping bilingual education, a sign that they are not willing to vote purely on ethnic lines.
"People in it for fast money were looking for big pieces of land to grab so they could hang a sign and say they were a uranium company, " Adnani says.
The no-ad system is used in King's World Team Tennis competition, and the ATP is experimenting with no lets on serves in Challenger events, a sign that they may bring it to pro events in the future.
Fogelman had made his fortune as a lawyer and real estate baron in Memphis, so when the team needed a little extra incentive to get Brett to sign, they offered the third baseman a piece of one of Fogelman's developments.
"The project should have a high chance of success - a check a few days later found that the moved mussels had opened up (started to filter feed), a sign that they were happy in their new locations, " he said.
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It seems like a victory of sorts: investors are moving out of the safe haven of long-term U.S. government bonds, a sign that they might be getting ready to put capital to work in riskier ways, which would benefit the economy.
Meanwhile, major international banks that were previously bullish on gold have been turning bearish and dramatically cutting their forecasts, and gold mining companies have been significantly cutting production and exploration efforts, not a sign that they believe the price decline is only temporary.
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And now that they're on a roll, will they sign at the negotiating table less than they can win by fighting?
And, but most MPs seemed to have thought they were bound to sign it, don't they, because the first two or three who said they weren't going to sign it caused a real fuss.
After experiencing the working world, they can sign up for classes when they have more focus.
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And I knew few patients who had chosen it, except maybe in their very last few days, because they had to sign a form indicating that they understood their disease was incurable and that they were giving up on medical care to stop it.
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