Hello friends, Why does classical physics not follow a probabilistic nature? And why is conventional predicting absent at microscopic levels? I have searched a little including sites like physics.exchange but only see responses that are "classical physics fails to predict this" or "it cannot explain this" or responses that are far beyond my syllabus. I know that for example you can't explain the photo-electric effect at a macroscopic level because the energy isn't related to the wave nature but rather the particulate nature. But what has that got to do with probability? This isn't really a homework question but I question I feel could come in my exam, and my understanding of quantum physics being probabilistic and classical physics being deterministic is quite poor. Still, I didn't think it was fit in the "Classical Physics" or "Quantum Physics" forums. Thanks for your help in advance.