Because the phonon was initiated by a single photon, which, until observed, cannot be said to have traveled to one diamond or the other. See http://en.wikipedi

Because the phonon was initiated by a single photon, which, until observed, cannot be said to have traveled to one diamond or the other. See http://en.wikipedia.org/wiki/Double-slit_experiment http://en.wikipedia.org/wiki/Double-slit_experiment .