I was listening to people in another forum discuss the idea of Quantum Immortality, and the thought occurred to me, is there a point where the odds of something occurring become so small, that they aren't just extremely, extremely remote, they are in fact, zero? For example, if we took a bucket of Nitrogen-13, which I believe has a half-life of ten minutes, and we waited for 100 years, the odds of not one atom of Nitrogen-13 decaying would seem to be extremely remote. But although the odds may get smaller and smaller, mathematically, they would never actually reach zero. We could wait a billion years, and it would still be possible that not one atom of Nitrogen-13 would have decayed. It seems like there is a Planck scale for everything else, but is there a Planck scale for probability? Or is this a ridiculous idea? If so, what am I missing?