However, his success as CEO is a big question mark hanging over Google at the moment.
No word on co-op play, but that set-up makes it a big question mark.
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The big question mark over the Romney growth package has been that of monetary policy.
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Despite Friday's events, David Cameron said there was still a "big question mark" over the eurozone's future.
The big question mark is over the legendary Maracana, which hosted the decisive World Cup finals clash in 1950.
"The big question mark is the economy potentially slowing further, " says Ross Nussbaum, a Bank of America REIT analyst.
So that means I have to put a big question mark over myself.
There was also a big question mark, Ahn added, over whether consumers would actually want phones with a flexible screen.
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The future of U.S.--Pakistan relations turned into a big question mark, after the recent visit of President Bush to South Asia.
Because all these events are difficult to predict, whether the January barometer will hold up next year is a big question mark.
While the portable video player may be a big question mark for adults, it has already become a hit in the children's market.
"The big question mark is how it's going to break down between how much is casual and how much is for core gamers, " Torres said.
On the whole, VR remains "a big question mark" for Valve.
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For example, if we look at the connected car via brands like OnStar and Ford SYNC, there is definitely a big question mark about sustainable subscription renewals.
So Jane Doe, as you unravel the who am I now question, it might be a good idea to let yourself off the hook for landing here, right now, with a big question mark on your forehead.
The big question mark remaining for the 3D home entertainment push is consumer confusion from competing technologies like active and passive stereoscopic (with glasses) 3D, and the newer autostereoscopic (glasses free) 3D like the Nintendo 3DS employs.
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You also touch on what has become, in some people's minds, urban legend, in other people's minds that big question mark, as to whether or not - and we saw it historically - and you talk about the, quote, bombing of the levees, the opening up of the waters to save other areas in the city and pouring it in on the 9th Ward, the poor section of New Orleans.
But there is a big question-mark over the willingness of even a right-wing government to sell more than 49% of the company.
Even more worrying, there is a big question-mark over the Fund's relevance.
Mark Zuckerberg himself will probably make the announcement on stage, but a big question is who else will be there.
All the biggest tech companies appear to be anticipating big holiday seasons for tablets across the board, but how it will all shake out remains a question mark.
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