The second fundamental misconception in inductivism is that scientific theories predict that βthe future will resemble the pastβ, and that βthe unseen resembles the seenβ and so on. (Or that it βprobablyβ will.) But in reality the future is unlike the past, the unseen very different from the seen. Science often predicts β and brings about β phenomena spectacularly different from anything that has been experienced before. For millennia people dreamed about flying, but they experienced only falling. Then they discovered good explanatory theories about flying, and then they flew β in that order. Before 1945, no human being had ever observed a nuclear-fission (atomic-bomb) explosion; there may never have been one in the history of the universe. Yet the first such explosion, and the conditions under which it would occur, had been accurately predicted β but not from the assumption that the future would be like the past. Even sunrise β that favourite example of inductivists β is not always observed every twenty-four hours: when viewed from orbit it may happen every ninety minutes, or not at all. And that was known from theory long before anyone had ever orbited the Earth.
The whole [scientific] process resembles biological evolution. A problem is like an ecological niche, and a theory is like a gene or a species which is being tested for viability in that niche.
The brain is the only kind of object capable of understanding that the cosmos is even there, or why there are infinitely many prime numbers, or that apples fall because of the curvature of space-time, or that obeying its own inborn instincts can be morally wrong, or that it itself exists.
Quantum computation is... a distinctively new way of harnessing nature... It will be the first technology that allows useful tasks to be performed in collaboration between parallel universes.
To me quantum computation is a new and deeper and better way to understand the laws of physics, and hence understanding physical reality as a whole.
The most important application of quantum computing in the future is likely to be a computer simulation of quantum systems, because that's an application where we know for sure that quantum systems in general cannot be efficiently simulated on a classical computer.
The truly privileged theories are not the ones referring to any particular scale of size or complexity, nor the ones situated at any particular level of the predictive hierarchy, but the ones that contain the deepest explanations.
The overwhelming majority of theories are rejected because they contain bad explanations, not because they fail experimental tests.
Science is objective. And in my view we cannot take any experimental results seriously except in the light of good explanations of them.
Where we have good, testable explanations, they then have to be tested, and we drop the ones that fail the tests.
Time travel may be achieved one day, or it may not. But if it is, it should not require any fundamental change in world-view, at least for those who broadly share the world view I am presenting in this book.
It is possible to build a virtual-reality generator whose repertoire includes every possible environment.
I don't think it would be a good idea for scientists to have more political power. Scientists as a group are more inclined to try to derive an ought from an is, than the population at large.
Our best theories are not only truer than common sense, they make more sense than common sense.
