Harold Jeffreys Quotes

• What the use of P [the significance level] implies, therefore, is that a hypothesis that may be true may be rejected because it has not predicted observable results that have not occurred.

  Harold Jeffreys

  Science, Use, Levels

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• The real difficulty about volcanism is not to see how it can start, but how it can stop.

  Harold Jeffreys

  Real, Difficulty

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• Variation must be taken as random until there is positive evidence to the contrary.

  Harold Jeffreys

  Taken, Variation, Evidence

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• There are some current 'theories' that, when divested of begged questions, reduce to the non-controversial statement, 'Here are some facts and there may be some relation between them.'

  Harold Jeffreys

  May, Facts, Controversial

  Harold Jeffreys (1998). “The Theory of Probability”, p.419, OUP Oxford

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• Una observación, estrictamente, no es más que una sensación. Nadie quiere decir que debamos rechazar todo salvo las sensaciones. Pero en cuanto vamos más allá de las sensaciones, hacemos inferencias.

  Harold Jeffreys

  Mean, Inference, Should

  Harold Jeffreys (1998). “The Theory of Probability”, p.412, OUP Oxford

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• A formal and consistent theory of inductive processes cannot represent the operation of every human mind in detail; it will represent an ideal mind, but it will help the actual mind to approximate that ideal.

  Harold Jeffreys

  Mind, Details, Helping

  Harold Jeffreys (1998). “The Theory of Probability”, p.421, OUP Oxford

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• All suggested accounts of the origin of the solar system are subject to serious objections. The conclusion in the present state of the subject would be that the system cannot exist.

  Harold Jeffreys

  Would Be, Serious, States

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• We have to come back to something like ordinary language after all when we
  want to talk "about" mathematics!

  Harold Jeffreys

  Want, Ordinary, Language

  Harold Jeffreys, Bertha Jeffreys (1999). “Methods of Mathematical Physics”, p.2, Cambridge University Press

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