"If we did not have free will, we could never decide to test a scientific theory. We could live in a world where objects tend to fly up in the air but be programmed to look only when they are in the process of falling. I must admit, I have no proof that you have free will, but I certainly enjoy free will, and you will never be able to show otherwise. This kind of discussion can often go round in circles. It is logically possible, but totally uninteresting, rather like solipsism which asserts that I am the only person in the world and that everyone else is just an illusion inhabiting my own mind. This hypothesis of superdeterminism hardly deserves mention and appears here only to illustrate the extent to which many physicists, even among specialists in quantum physics, are driven almost to despair by the true randomness and nonlocality of quantum physics. But for me, the situation is very clear: not only does free will exist, but it is a prerequisite for science, philosophy, and our very ability to think rationally in a meaningful way. Without free will, there could be no rational thought. As a consequence, it is quite simply impossible for science and philosophy to deny free will."