@kennethamy,
kennethamy;154190 wrote:It is physically necessary that the cannon ball falls down, since that it falls down follows from certain laws of nature,
Actually, rules of nature are merely explanations of reality that we invented. We observed nature and formulated rules that we think it operates by. We can't then say that nature has to behave as the laws say. (That would be circular.) The cannonball might just stay in the air one day, we don't know.
The argument I'm making is not that reality is
knowable through laws of physics, but that reality is specific, i.e. it can only happen one way. Do I make sense?
kennethamy;154190 wrote:When I do what I want to do, and am under not compulsion, I do what I do of my own free will.
It depends what we mean by free will. In a political context I define 'freedom' as you seem to do here, as the ability to not be coerced. So when nobody forces your choice, you are free. But in this context, by 'free will' we mean that "you could not have decided otherwise". It is purely a question of what happens in your own head. And in that sense, we only think that we could have decided otherwise.