I have heard it stated by renowned scientists, for example Stephen Hawking, that the macroscopic world is completely deterministic from a theoretical if not practical perspective, while the quantum realm is probabilistic. My question concerns the interaction of atomic radiation with the macroscopic world. The emission of a particle from a particular nucleus at a particular time is, as I understand it, purely probabilistic. If that particle hits a DNA molecule and causes a mutation resulting in cancer how can that cancer be said to be theoretically deterministic?
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