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Valentine Telegdi

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The trouble with theorists is, they never pay attention to the experiments!
--
as quoted by Richard Feynman (1985). "Surely you're joking, Mr. Feynman!": adventures of a curious character. W. W. Norton. p. 253. ISBN 0393316041. 

 
Valentine Telegdi

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The job of theorists, especially in biology, is to suggest new experiments. A good theory makes not only predictions, but surprising predictions that then turn out to be true. (If its predictions appear obvious to experimentalists, why would they need a theory?)

 
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It was Gandhi who made the most significant personal contribution in the history of the nonviolent technique, with his political experiments in the use of noncooperation, disobedience and defiance to control rulers, alter government policies, and undermine political systems. With these experiments the character of the technique was broadened and its practice refined. Among the modifications Gandhi introduced were greater attention to strategy and tactics, a more judicious use of the armory of nonviolent methods, and a conscious association between mass political action and the norm of nonviolence.

 
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All experiments in psychology are not of this [cargo cult] type, however. For example there have been many experiments running rats through all kinds of mazes, and so on — with little clear result. But in 1937 a man named Young did a very interesting one. He had a long corridor with doors all along one side where the rats came in, and doors along the other side where the food was. He wanted to see if he could train rats to go to the third door down from wherever he started them off. No. The rats went immediately to the door where the food had been the time before.
The question was, how did the rats know, because the corridor was so beautifully built and so uniform, that this was the same door as before? Obviously there was something about the door that was different from the other doors. So he painted the doors very carefully, arranging the textures on the faces of the doors exactly the same. Still the rats could tell. Then he thought maybe they were smelling the food, so he used chemicals to change the smell after each run. Still the rats could tell. Then he realized the rats might be able to tell by seeing the lights and the arrangement in the laboratory like any commonsense person. So he covered the corridor, and still the rats could tell.
He finally found that they could tell by the way the floor sounded when they ran over it. And he could only fix that by putting his corridor in sand. So he covered one after another of all possible clues and finally was able to fool the rats so that they had to learn to go to the third door. If he relaxed any of his conditions, the rats could tell.
Now, from a scientific standpoint, that is an A-number-one experiment. That is the experiment that makes rat-running experiments sensible, because it uncovers the clues that the rat is really using — not what you think it's using. And that is the experiment that tells exactly what conditions you have to use in order to be careful and control everything in an experiment with rat-running.
I looked into the subsequent history of this research. The next experiment, and the one after that, never referred to Mr. Young. They never used any of his criteria of putting the corridor on sand, or of being very careful. They just went right on running rats in the same old way, and paid no attention to the great discoveries of Mr. Young, and his papers are not referred to, because he didn't discover anything about rats. In fact, he discovered all the things you have to do to discover something about rats. But not paying attention to experiments like that is a characteristic of cargo cult science.

 
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It is not my purpose to attempt a real autobiography. I simply want to tell the story of my experiments with truth...as my life consists of nothing but those experiments.

 
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The trouble with most Englishwomen is that they will dress as if they had been a mouse in a previous incarnation... they do not want to attract attention.

 
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