Jevons's rule of logic

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Jevons's rule of logic or Jevons's elementary rule of logic, stated in Latin as flasa in uno falsa in omnibus, is simply expressing the obvious that a single absolute conflict between fact and hypothesis is fatal to the hypothesis. It is named after W. Stanley Jevons, who articulated this rule in his book The principles of science – A Treatise on Logic and the Scientific Method.[1]


  1. Randal Hedtke (1983, 2010). Secrets of the Sixth Edition. Master Books, 60. ISBN 978-0-89051-597-6.