Furthermore, explains Surowiecki, there was no correlation between the performance of the smartest person in the group and the performance of that group.

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There was no correlation with colon cancer at all, though men with a mutation seemed to run a slightly higher risk of prostate cancer.

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There was no correlation to calligraphy or Arab-esque patterns.

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It was a convincing correlation (there was no other likely cause of so many deaths), but a correlation an entirely data-based conclusion nonetheless.

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There was still a negative correlation between the size of the national debt and GDP growth, but there was no implied causal relationship or sudden change at 90 percent.

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