Atheism and the existence of peanut butter

[Angrboda]

So your basic claim is wrong: determinism doesn't work in QM the way you claim it does. It works at the level of probabilities, not at the level of events.

But couldn't there (hypothetically) be events that do cause the nucleus to decay, but we aren't aware of them/are unable to observe them?

Not asking in the context of the debate... just in a "curious about science" way.

Qunatum mechanics rules out local hidden variables (i.e. causes), so the only hidden variables would have to be global in some sense. See David Bohm's theories.