At least some failures of repeatability in systems such as hard drives or coin-flipping experiments are attributable to quantum indeterminism.

There have even been studies of paradigmatically “chancy” phenomena such as coin-flipping, which show that if starting conditions can be precisely controlled and outside interferences excluded, identical behavior results (see Diaconis, Holmes & Montgomery 2007). Most of these bits of evidence for determinism no longer seem to cut much ice, however, because of faith in quantum mechanics and its indeterminism. Indeterminist physicists and philosophers are ready to acknowledge that macroscopic