A Quote by Milton Friedman

The only relevant test of the validity of a hypothesis is comparison of prediction with experience.

Milton Friedman

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Experience Comparison Hypothesis Only Prediction Relevant Test Validity

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Milton Friedman
American - Economist
July 31, 1912 - November 16, 2006

There is no example of someone reading their scripture and saying, 'I have a prediction about the world that no one knows yet, because this gave me insight. Let's go test that prediction,' and have the prediction be correct.

Neil deGrasse Tyson

However the machine would permit us to test the hypothesis for any special value of n. We could carry out such tests for a sequence of consecutive values n=2,3,.. up to, say, n=100. If the result of at least one test were negative, the hypothesis would prove to be false; otherwise our confidence in the hypothesis would increase, and we should feel encouraged to attempt establishing the hypothesis, instead of trying to construct a counterexample.

Alfred Tarski

Certainly Christianity is an experience, but equally clearly the validity of ane experience has to be tested. There are people in lunatic asylums who have the experience of being the Emperor Napoleon or a poached egg. It is unquestionably an experience, and to them a real experience, but for all that it has no kind of universal validity. It is necessary to go far beyond simply saying that something comes from experience. Before any such thing can be evaluated at all, the source and character of the experience must clearly be investigated.

William Barclay

What is the fundamental hypothesis of science, the fundamental philosophy? We stated it in the first chapter: the sole test of the validity of any idea is experiment. ... If we are told that the same experiment will always produce the same result, that is all very well, but if when we try it, it does not, then it does not. We just have to take what we see, and then formulate all the rest of our ideas in terms of our actual experience.

Richard P. Feynman

There is no justifiable prediction about how the hypothesis will hold up in the future; its degree of corroboration simply is a historical statement describing how severely the hypothesis has been tested in the past.

Robert Nozick

It appears, then, to be a condition of a genuinely scientific hypothesis, that it be not destined always to remain an hypothesis, but be certain to be either proved or disproved by.. .comparison with observed facts.

John Stuart Mill

Most corporate decisions aren't going to meet the test of high validity. But they're going to be way above the low-validity situations that we worry about.

Gary A. Klein

A hypothesis is empirical or scientific only if it can be tested by experience. A hypothesis or theory which cannot be, at least in principle, falsified by empirical observations and experiments does not belong to the realm of science.

Francisco J. Ayala

the heart of religion is not altered states but altered traits of character. For me, then, the test of a substance's religious worth or validity is not what kind of far-out experience it can produce, but is the life improved by its use? That's the test. Now, on that score, if you remove the "religious cocoon," the experiences don't seem to have much in the way of discernible, traceable effects.

Huston Smith

[Coining phrase "null hypothesis"] In relation to any experiment we may speak of this hypothesis as the "null hypothesis," and it should be noted that the null hypothesis is never proved or established, but is possibly disproved, in the course of experimentation. Every experiment may be said to exist only in order to give the facts a chance of disproving the null hypothesis.

Ronald Fisher

The only way to test a hypothesis is to look for all the information that disagrees with it.

Karl Popper

The physicist can never subject an isolated hypothesis to experimental test, but only a whole group of hypotheses.

Pierre Duhem

Making an investment decision is like formulating a scientific hypothesis and submitting it to a practical test. The main difference is that the hypothesis that underlies an investment decision is intended to make money and not to establish a universally valid generalization.

George Soros

I do not yet want to form a hypothesis to test, because as soon as you make a hypothesis, you become prejudiced. Your mind slides into a groove, and once it is in that groove, has difficulty noticing anything outside of it. During this time, my sense must be sharp; that is the main thing - to be sharp, yet open.

Bernd Heinrich

The sad truth is that it is precisely those who disagree most with the hypothesis of efficient market pricing of stocks, those who pooh-pooh beta analysis and all that, who are least able to understand the analysis needed to test that hypothesis.

Paul Samuelson

Scientists do not collect data randomly and utterly comprehensively. The data they collect are only those that they consider *relevant* to some hypothesis or theory.

J. David Lewis-Williams

A Quote by Milton Friedman

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