"All scientific work is incomplete – whether it be observational or experimental. All scientific work is liable to be upset or modified by advancing knowledge. That does not confer upon us a freedom to ignore the knowledge we already have, or to postpone the action that it appears to demand at a given time."

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Attribution

Quote text and notes from Wikiquote: Austin Bradford Hill (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.