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All scientists know of colleagues whose minds are so well equipped with the means of refutation that no new idea has the temerity to seek admittance. Their contribution to science is accordingly very small.

Peter Medawar

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Peter Medawar
Age: 72 †
Born: 1915
Born: February 28
Died: 1987
Died: October 2
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P.B. Medawar
P. B. Medawar
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More quotes by Peter Medawar

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I regret my disbelief in God.
Peter Medawar
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Psychoanalytic theory is the most stupendous intellectual confidence trick of the twentieth century and a terminal product as well-something akin to a dinosaur or zeppelin in the history of ideas, a vast structure of radically unsound design and with no posterity.
Peter Medawar
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A danger sign that fellow-obsessionals will at once recognize is the tendency to regard the happiest moments of your life as those that occur when someone who has an appointment to see you is prevented from coming.
Peter Medawar
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Scientific reasoning is a dialogue between the possible and the actual, between proposal and disposal between what might be true, and what is in fact the case.
Peter Medawar
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It can be said with complete confidence that any scientist of any age who wants to make important discoveries must study important problems. Dull or piffling problems yield dull or piffling answers. It is not enough that a problem should be interesting.
Peter Medawar
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I do not believe indeed, I deem it a comic blunder to believe that the exercise of reason is sufficient to explain our condition and where necessary to remedy it, but I do believe that the exercise of reason is at all times necessary.
Peter Medawar
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Twice in my life I have spent two weary and scientifically profitless years seeking evidence to corroborate dearly loved hypotheses that later proved to be groundless times such as these are hard for scientists-days of leaden gray skies bringing with them a miserable sense of oppression and inadequacy.
Peter Medawar
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The purpose of scientific enquiry is not to compile an inventory of factual information, nor to build up a totalitarian world picture of natural Laws in which every event that is not compulsory is forbidden. We should think of it rather as a logically articulated structure of justifiable beliefs about nature.
Peter Medawar
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When asked to make the formal declaration that I did not intend to overthrow the Constitution of the United States, I was fool enough to reply that I had no such purpose, but that were I to do it by mistake I should be inexpressibly contrite.
Peter Medawar
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Heredity proposes and development disposes.
Peter Medawar
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I reckon that for all the use it has been to science about four-fifths of my time has been wasted, and I believe this to be the common lot of people who are not merely playing follow-my-leader in research.
Peter Medawar
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No scientist is admired for failing in the attempt to solve problems that lie beyond his competence. ... Good scientists study the most important problems they think they can solve. It is, after all, their professional business to solve problems, not merely to grapple with them.
Peter Medawar
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The intensity of a conviction that a hypothesis is true has no bearing on whether it is true or false. The importance of the strength of our conviction is only to provide a proportionately strong incentive to find out if the hypothesis will stand up to critical evaluation.
Peter Medawar
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Scientists who think science consists of unprejudiced data-gathering without speculation are merely cows grazing on the pasture of knowledge.
Peter Medawar
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The fact that scientists do not consciously practice a formal methodology is very poor evidence that no such methodology exists. It could be said-has been said-that there is a distinctive methodology of science which scientists practice unwittingly, like the chap in Moliere who found that all his life, unknowingly, he had been speaking prose.
Peter Medawar
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The bells which toll for mankind are - most of them, anyway - like the bells of Alpine cattle they are attached to our own necks, and it must be our fault if they do not make a cheerful and harmonious sound.
Peter Medawar
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In no sense other than an utterly trivial one is reproduction the inverse of chemical disintegration. It is a misunderstanding of genetics to suppose that reproduction is only 'intended' to make facsimiles, for parasexual processes of genetical exchange are to be found in the simplest living things.
Peter Medawar
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Scientists are people of very dissimilar temperaments doing different things in very different ways. Among scientists are collectors, classifiers and compulsive tidiers-up many are detectives by temperament and many are explorers some are artists and others artisans. There are poet-scientists and philosopher-scientists and even a few mystics.
Peter Medawar
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An experiment not worth doing is not worth doing well.
Peter Medawar
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The art of research [is] the art of making difficult problems soluble by devising means of getting at them.
Peter Medawar