I have always been quite curious how physicists reconcile the concept free will with the determinism of physics. By determinism I mean the one at macroscopic level, because I know that at quantum level most of the things are based on probabilities. So there's no free will for an electron. But, at macroscopic level, everything seems to have some equation that determines its future, even if that's chaotic and very difficult (for us) to predict. So there's no free will for the Moon, as we'll know its exact position million of years in the future; in the same way, there's no free will for a drop of water falling in a waterfall - it's future is pre-determined, even if it is very difficult for us to calculate that. Similarly, there's no free will for a computer, given for the same set of inputs it will always produce the same outputs. So if I'm to believe in physics determinism, I should give up on the concept of free will, because like a computer whatever choice I'm going to make has been pre-determined by my history, genetics, inputs, environment and so forth - even if that choice may be, to our current capabilities, unpredictable, because it would depend on a very complicated equation. That is very depressing, and as I love physics and much as I love my free will, I just don't think about that. So how do physicists answer that dilemma - is there free will in physics?