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John Moffat (physicist)

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One truth we have been able to count on concerning scientific persuit over the centuries has been that only testable theories survive the intense scrutiny of experimental science.
Chapter 8, Strings And Quantum Gravity, p. 136

John Moffat (physicist)

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A principle of induction would be a statement with the help of which we could put inductive inferences into a logically acceptable form. In the eyes of the upholders of inductive logic, a principle of induction is of supreme importance for scientific method: "... this principle", says Reichenbach, "determines the truth of scientific theories. To eliminate it from science would mean nothing less than to deprive science of the power to decide the truth or falsity of its theories. Without it, clearly, science would no longer have the right to distinguish its theories from the fanciful and arbitrary creations of the poet's mind."
Now this principle of induction cannot be a purely logical truth like a tautology or an analytic statement. Indeed, if there were such a thing as a purely logical principle of induction, there would be no problem of induction; for in this case, all inductive inferences would have to be regarded as purely logical or tautological transformations, just like inferences in inductive logic. Thus the principle of induction must be a synthetic statement; that is, a statement whose negation is not self-contradictory but logically possible. So the question arises why such a principle should be accepted at all, and how we can justify its acceptance on rational grounds.

Karl Popper

The methods of science aren't foolproof, but they are indefinitely perfectible. Just as important: there is a tradition of criticism that enforces improvement whenever and wherever flaws are discovered. The methods of science, like everything else under the sun, are themselves objects of scientific scrutiny, as method becomes methodology, the analysis of methods. Methodology in turn falls under the gaze of epistemology, the investigation of investigation itself--nothing is off limits to scientific questioning. The irony is that these fruits of scientific reflection, showing us the ineliminable smudges of imperfection, are sometimes used by those who are suspicious of science as their grounds for denying it a privileged status in the truth-seeking department--as if the institutions and practices they see competing with it were no worse off in these regards. But where are the examples of religious orthodoxy being simply abandoned in the face of irresistible evidence? Again and again in science, yesterday's heresies have become today's new orthodoxies. No religion exhibits that pattern in its history.

Daniel C. Dennett

Though he was proud of his scientific method, most of Marx' predictions are like Jewish prophecies and Christian revelations, inspiring, sometimes self-fulfilling, certainly true for the faithful, but not testable by scientific means.

Karl Marx

[M]ost of Marx' theories which are not mistaken are meaningless. Marx remained influential, however: his influence never was based on the scientific truth-content of his theories but on their psychological appeal.

Karl Marx

An open society such as ours is based on the recognition that our understanding of reality is inherently imperfect. Nobody is in possession of the ultimate truth. As the philosopher Karl Popper has shown, the ultimate truth is not attainable even in science. All theories are subject to testing and the process of replacing old theories with better ones never ends.

George Soros
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