Could there be more than three?
A possible way of resolving the greatest problem of physics.
Open door #1 and scroll through our changing understanding of gravity...
Most of us think that we have the capacity to act freely. Our sense of morality, our legal system, our whole culture is based on the idea that there is such a thing as free will. It's embarrassing then that classical physics seems to tell a different story. And what does quantum theory have to say about free will?