Determinism

I'm putting this in GC because I don't care for extensively serious discussions (but that doesn't preclude it from the discussion). I wanted to know your thoughts on Determinism.

Specifically I'm going to veer the discussion into the realm of science in order to dodge a bullet. Science typically viewed that determinism was possible because (using newtonian physics) one can make very accurate predictions on the consequences of events given sufficient information. In theory using this view, one could expect that the universe, if reversed and started again, would have the same result as it is now.

Quantum Mechanics and the like will argue that due to the unpredictability of events at the quantum/atomic level would produce other results. I am of the opinion that while this is true, it does not affect macroscopic systems, and thus determinism in theory is possible.

Okay your turn.