Mathematics is the only good metaphysics.
Interview with P. A. M. Dirac By Thomas S. Kuhn and Eugene Paul Wigner At Wigner’s home, Princeton, New Jersey April 1, l962
About Dirac I always recomend this wonderful book from Graham Farmelo: The Strangest Man: The Hidden Life of Paul Dirac, Mystic of the Atom, and alternatively, this conference by the author:
Religion is a culture of faith; science is a culture of doubt.
Artificial intelligence is the science of making machines do things that would require intelligence if done by men.
Today the network of relationships linking the human race to itself and to the rest of the biosphere is so complex that all aspects affect all others to an extraordinary degree. Someone should be studying the whole system, however crudely that has to be done, because no gluing together of partial studies of a complex nonlinear system can give a good idea of the behavior of the whole.
I just think too many nice things have happened in string theory for it to be all wrong. Humans do not understand it very well, but I just don’t believe there is a big cosmic conspiracy that created this incredible thing that has nothing to do with the real world.