If we look at the way the universe behaves, quantum mechanics gives us fundamental, unavoidable indeterminacy, so that alternative histories of the universe can be assigned probability.
Murray Gell-MannIn fact any experiment that measures a quantum effect is one in which the quantum effect is aligned with the behavior of some heavy, macroscopic object; that's how we measure it
Murray Gell-MannWe are driven by the usual insatiable curiosity of the scientist, and our work is a delightful game.
Murray Gell-MannSometimes the probabilities are very close to certainties, but they're never really certainties
Murray Gell-Mann