They firmly believe that their offerings require a particular skill set to succeed in the games they provide.

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They firmly believe that if they get customer service right, profits will follow.

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Since most Venezuelans firmly believe that oil means they ought to be rich, reforming the economy is hard.

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"I firmly believe that should future generations of geologists come back, they will identify these features as pervasive in the geological sense, " says Professor Wolfe.

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