There is true randomness stemming from real random processes. There is also effective randomness coming from chaotic processes. Chaos means that perturbations g

There is true randomness stemming from real random processes. There is also effective randomness coming from chaotic processes. Chaos means that perturbations grow very fast. Then there is the uncertainty principle which sets a limit to how precisely you can know the initial conditions. So even with infinite computing power most observations can not be predicted for longer amount of times. This leaves a lot of space for free will. And also for esoteric theories.