The Statistical special pleading reference article from the English Wikipedia on 24-Jul-2004
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Statistical special pleading

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Statistical special pleading is a logical fallacy which occurs when the interpretation of the relevant statistic is "massaged" by looking for ways to reclassify or requantify data from one portion of results, but not applying the same scrutiny to other categories.

Examples:

See also faulty generalization for other fallacies involving generalization.