There are also other doubts, as my colleague Jeff Brady found back in Parachute, Colorado.
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However, other experts expressed doubts over whether people can become addicted to food.
Other analysts with greater doubts about global growth and more optimism about OPEC's capacity give it four years or more.
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Stand-in skipper Michael Clarke said it added to a number of other recent incidents which raised doubts about the 33-year-old all-rounder's commitment.
Sometimes you are so clear on what job you want that saying no seems fairly straightforward, but in other instances you might have doubts or feel that job might be something you would be more interested in when you are ready to make another career move.
But no one doubts that in those other cases, the change was for the better.
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The greatest danger to Gore's future is focused in one sector -- in the doubts of his peers, of other white males.
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However, as this fund is still being created, there are still doubts as to whether investors or other international banks will join in this effort.
The state of Banco CAM in particular has fuelled doubts about the credit quality of other lenders and hurt the Bank of Spain's reputation for tight supervision.
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"The Commission believes that these undertakings reduce significantly the ability of Canal Plus to influence other major US studios and eliminate the serious doubts as to the strengthening of a dominant position of Canal Plus following its vertical integration with Universal, " it said.
When doubts emerged about Avastin and Tarceva, other clinical trials that ultimately proved the medicines' worth were already ongoing.
If one retains doubts about the benefit of trying anything other than gold, there is still an important reason to advocate private currency competition over a government gold standard, and that is the practical execution of the standard.
Other drugs expected to yield data next year also may face some doubts.
Secondly, the detection of multiple planets demolishes once and for all the lingering doubts of some astronomers that the single planets found around other stars are not planets at all, but small, faint components in otherwise conventional binary star systems.
But other gang members, like Alex Vasquez of the Compton Varrio Tres, doubts he will ever escape the neighborhood alive.
And I have my doubts as to whether biofuels can match the speed and efficiency of other alternative energies.
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In other words, while you can install an app like Photoshop on a full Windows 8 machine, you can't do it here, nor any other Windows application written since the dawn of the OS. Additionally, we have our doubts about whether anyone going forward will bother to write desktop apps versus those more optimized for running in the de facto Live Tile interface.
He also doubts whether indigenous communities necessarily have the right to surrender plants that might grow in other countries too.
" That wasn't good enough for 7-Eleven, which doubts the veracity of those excuses and canned SoRelle and the others with little explanation other than "the numbers didn't add up.
Galileo soon began to have doubts about this orthodoxy, which he aired in conversation with friends and then in correspondence with other natural philosophers in Europe, particularly the great German astronomer Johannes Kepler.
To Mr Cameron's surprise, all of the other 26, including several erstwhile allies, declared their wish to sign up (though some later expressed doubts, and several may find it hard to secure approval from national parliaments or in referendums).
But whatever doubts may exist over that, there was no questioning Mr McCain's moral clarity on two other issues this year, both concerning foreign policy.
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