The controversy points to a broader factor that may have helped in New Orleans.

这些争议指向了一个更宽泛的因素，它可能对新奥尔良有所帮助。

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Although the journal evaluation index system featuring the adoption of citation data such as journal impact factor as its core is widely used, this system has long been the center of controversy.

以影响因子等引文数据为核心的期刊评价指标体系虽广为使用，但也备受争议。

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And there is tremendous controversy on this head, especially on whether success at Lumosity games is a factor of repetition and gamesmanship, rather than innate cognitive ability.

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