In 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-MannIn our work, we are always between Scylla and Charybdis; we may fail to abstract enough, and miss important physics, or we may abstract too much and end up with fictitious objects in our models turning into real monsters that devour us.
Murray Gell-MannSometimes the probabilities are very close to certainties, but they're never really certainties
Murray Gell-Mann