Everything in classical physics can be predicted 100%. If the universe was 100% classical that would mean everything since the big bang until now was all 100% physics and chemistry in dumb automation, FREE WILL DOES NOT EXIST and me shitposting on this forum about this was predetermined 13.8 billion years ago or even aeons of infinite previous big bangs. The cure for tinnitus will not come from the free will of scientist researching but just random bio-chemical processes in a dumb universe.
Quantum physics makes zero fucking sense. but it might allow free will, consciousness and biology to have a better explanation then random automation.
(light particles) Photons decide rather to become a wave or particle at random, they instant travel (faster then light). They are documented to be in multiple places at once (super positions). The observers may influence the process. Particles may be going forwards and backwards in time. Parrerel universes may just exist as states of probability for FREE WILL.
It seems like the materalist/atheist crowd is trying to downplay the reality of quantum physics, just sweep it under the rug. They already showed birds and plants have biological quantum mechanics and it's open for debate if it exist inside brain neurons.