But it has to be more reliable and secure.

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For more than a decade the FAA has promised to modernize and make the civil aviation system more efficient and reliable, but the only things it has reliably generated are delays or cost overruns or usually both.

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Of course, intellectual brilliance has yet to prove that it is more likely to produce reliable forecasts of the future than crystal balls.

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Nissan's biggest problem was that it has been making reliable but boring cars, which customers shunned in favour of more attractive Hondas (in Japan) or Volkswagens (in Europe).

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Sentiment analysis has evolved over the last five or six years into a process which makes it more reliable and consistent, he explained.

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