A theory which is not refutable by any conceivable event is non-scientific. Irrefutability is not a virtue of a theory (as people often think) but a vice.
Interpretation
A scientific theory must be testable and falsifiable; if it can't be proven wrong, it's not genuine science.
Karl Popper emphasizes that for a theory to be scientific, it must be subject to potential refutation. He argues that a theory's ability to be proven wrong is what distinguishes scientific inquiry from mere speculation, suggesting that people mistakenly view irrefutability as a strength rather than acknowledging it as a fundamental flaw in the realm of science.
In practice
In a science class discussing the importance of testable hypotheses.
The growth of our knowledge is the result of a process closely resembling what Darwin called 'natural selection'; that is, the natural selection of hypotheses: our knowledge consists, at every moment, of those hypotheses which have shown their (comparative) fitness by surviving so far in their struggle for existence, a competitive struggle which eliminates those hypotheses which are unfit.
If you can't say it simply and clearly, keep quiet, and keep working on it till you can.
No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct.
The belief in a political Utopia is especially dangerous. This is possibly connected with the fact that the search for a better world, like the investigation of our environment, is (if I am correct) one of the oldest and most important of all the instincts.
A rationalist is simply someone for whom it is more important to learn than to be proved right; someone who is willing to learn from others - not by simply taking over another's opinions, but by gladly allowing others to criticize his ideas and by gladly criticizing the ideas of others
Thus science must begin with myths, and with the criticism of myths; neither with the collection of observations, nor with the invention of experiments, but with the critical discussion of myths, and of magical techniques and practices.
Every great advance in natural knowledge has involved the absolute rejection of authority.
Medicine is not only a science; it is also an art. It does not consist of compounding pills and plasters; it deals with the very processes of life, which must be understood before they may be guided.
Scientific theories tell us what is possible; myths tell us what is desirable. Both are needed to guide proper action.
I still hear some people say that science takes the wonder out of life. Those people are utterly wrong. Science takes us to the wonder
Tiny differences in input could quickly become overwhelming differences in output.... In weather, for example, this translates into what is only half-jokingly known as the Butter- fly Effectβthe notion that a butterfly stirring the air today in Peking can transform storm systems next month in New York.
When we think about global warming at all, the arguments tend to be ideological, theological and economic.
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