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Alfred Marshall on Facts and Figures Speaking for Themselves

Experiences on controversies such as these brings out the impossibility of learning anything from facts till they are examined and interpreted by reason; and teaches that the most reckless and treacherous of all theorists is he who professes to let facts and figures speak for themselves, who keeps in the background the part he has played, perhaps unconsciously, in selecting and groupoing them, and in suggesting the argument post hoc ergo propter hoc.

Alfred Marshall

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