Giving up Einstein's theory of gravity is simply unacceptable to many in the community. It may take a new generation of physicists to view the evidence with unclouded eyes.
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Epilogue, p. 221John Moffat (physicist)
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Could it be, nevertheless, that Einstein's theory is wrong? Might it be necessary to modify it—to find a new theory of gravity that can explain both the stronger gravity and the apparent antigravity being observed today—rather than simply throwing in invisible things to make the standard model work?
John (physicist) Moffat
To physicists such as myself, the huge amount of invisible dark matter needed to make Einstein's theory fit the astrophysical data is reason enough for exploring modified gravity theories.
John (physicist) Moffat
Einstein is the only figure in the physical sciences with a stature that can be compared with Newton. Newton is reported to have said "If I have seen further than other men, it is because I stood on the shoulders of giants." This remark is even more true of Einstein who stood on the shoulders of Newton. Both Newton and Einstein put forward a theory of mechanics and a theory of gravity but Einstein was able to base General Relativity on the mathematical theory of curved spaces that had been constructed by Riemann while Newton had to develop his own mathematical machinery. It is therefore appropriate to acclaim Newton as the greatest figure in mathematical physics and the Principia is his greatest achievement.
Stephen Hawking
Why is Einstein's theory better than Lorentz's theory? It would be a mistake to argue that Einstein's theory gives an explanation of Michelson's experiment, since it does not do so. Michelson's experiment is simply taken over as an axiom.
Hans Reichenbach
With the hubris common to physicists, I have always felt that I have known what good science is — it is theory cast in terms of mechanisms that describe how parts of the universe behave. With sometimes immense historical delay, these mechanisms always move towards being grounded in the larger mechanistic view of the universe. Theories always propose a view of how the universe is. They can never be effectively argued to be true, but only be brought before the bar of empirical evidence. All the modern concern for contextualism, hermeneutics and the social determination of meaning has its point, but is a mere footnote to the massive evidence for this view of science. The overwhelming success within this framework of modern biology over the last half century has provided another major confirmation, if one is needed. Someday we will get another striking confirmation from cognitive science. Though it can be argued that we are well on our way, we still have an immense distance to go. Arguments are no match for the evidence that cognitive science does not control its subject the way physics, chemistry and now biology do.
Allen Newell
Moffat, John (physicist)
Moffat, Steven
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