Speaking in Hungary today, Russian President Vladimir Putin said he was still optimistic a compromise could be reached.
Councillor Jen Powell said she was optimistic a festival would be held.
The head of the UN's panel of climate experts, Rajendra Pachauri, said he was now very optimistic a deal could be reached in Copenhagen.
Mr Woollons said he had also had fresh interest in the Helmsley shop and was optimistic a buyer for that store could also be found.
The BOA has previously come under fire for setting what its critics consider an overly-optimistic a target of fourth place in the overall medal table at the London Olympics.
However, when the information was worse than estimated, the more optimistic a participant was (according to the personality questionnaire), the less efficiently in the frontal areas of the brain was the information processed, suggesting participants were disregarding the evidence presented to them.
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The most active options on TJX Companies suggest at least one strategist is positioning for fresh all-time highs in the price of the underlying in the near term, while other traders may not be assuming as optimistic a stance on the name.
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Now, after finishing 2010 with a bang, carmakers are optimistic that a recovery is at hand and consumers will be in the market for new cars again.
In a more optimistic scenario, a recovering economy might encourage the Federal Reserve to start increasing rates to head off inflation.
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It will continue to trade as a going concern, and chief executive David Sculley says he remains "optimistic" a buyer can be found.
Under these conditions, the White House is cautiously optimistic that a compromise could be reached.
Among those who were optimistic, a significant factor was the perceived opportunity created by digital start-ups.
But it is too early to be optimistic about a rebound in private equity.
Mr Holdcroft said he was "optimistic" a use could be found for the Spa.
The NUT's Christine Blower has told the BBC she is optimistic about a deal for teachers.
Campaigners hoping to save children's heart surgery in Leicester remain cautiously optimistic after a High Court ruling.
However businesses are optimistic that a more limited change, specific to the clothing industry, may sneak through.
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Mr Bhalla, for one, is optimistic that a resolution is in sight in the next year or two.
Such high expectations seem overly optimistic for a company with no recent track record of economic profitability.
Though Slovenia is certainly moving ahead fast, that timetable is probably too optimistic by a couple of years.
Scolari himself is optimistic that a deal can be done for the player.
Mr Kinsay said National Grid had spoken to Horizon and they are still "optimistic" a buyer will be found.
When you meet with an investor you have to learn to be optimistic in a uniquely realistic kind of way.
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For now, I am optimistic that a virtuous cycle of expansion has a chance to work for the intermediate term.
Edinburgh Airport has said it is optimistic of a return to growth this year, after reporting a fall in passenger numbers.
This expectation seems overly optimistic for a company with a declining NOPAT and no track record of economic profitability.
He was optimistic that a strong America could advance the peace, and he acted to build the strength that mission required.
Black filmmakers remain optimistic that a new genre of black films, depicting universal themes, will appeal to moviegoers of all colors.
Though some of the most controversial ones are still left, both sides are optimistic that a final vote will be held Thursday.
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