He also misjudged how long it would take to turn around the flagship chain.
And what if that car, which also knows how long it will take you to get home from work, could instruct your household thermostat to crank up the heat 10 minutes before your scheduled arrival?
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But Hoyer also refuses to predict how long it might take to work out differences on either side.
It can also tell how long you sleep each night, as well as how long it takes you to nod off.
History also delivers sobering news on how long it might take to recover our economic health.
He also didn't consider how long it would take for viewers to trade in their analog set-top boxes for the digital devices needed.
But it also made a tactical long-term decision on how it handles its investments.
It is also not known how long Tarrant will stay on the new breakfast show.
"It is a tremendous tragedy and it is a tremendous loss but it has also made many of us think very long and hard about what we do and how we do it and try and be better, " she said.
Portugal and Spain are also looking to the horizon to gauge how long and challenging it will be for both to tap back into the bond markets once this all blows over.
The team is also unsure how long the animal had been at large in Devon before it was killed.
They also looked at a range of cultural trends, such as how long it takes innovations to impinge on the popular consciousness (which is happening ever more quickly), the age at which celebrities become famous (which is dropping, albeit at the expense of ultimately shorter spells in the limelight), as well as many other more or less frivolous trends.
Also, should this by a freak of chance not happen, how long would it have taken for the twins to sell it?
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The Labour manifesto also said it would introduce fixed term parliaments, but did not say how long they would be.
"They also get a service that is more reliable, it doesn't matter how long the fibre between your house and our exchange is, you get a reliable service, " he said.
The focus on the long and difficult supply lines was also a reminder of how vulnerable Nato will be as it trundles thousands of tons of equipment home, and men and materiel queue up to get out.
There is also concern about how ground water and irrigation wells will be affected: it is hard to judge how long it takes for a coal aquifer to refill.
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