In the world of physics "determinism" died when Newton's world view was replaced with quantum mechanics. In quantum mechanics particles and even an objects wether it is a muon or a cat can be in multiple states at one time until according to the Copenhagen interpretation of quantum mechanics - an "observer" tries to measure the system, and that forces the multiple quantum states to collapse into a single state. In other words, in physics the "act of making an observation" forces the universe to "make a choice" about which quantum state it is in. This in popular science books about quantum mechanics is called "The Schroedinger's Cat Experiment". In a physics laboratory these quantum states might be electrons in a "spin-up" state or a "spin-down" state. But nothing prevents these "states" from being larger objects, and recent experiments in university physics laboratories have seem this with large physical objects visible to the human eye. So, what does that have to "free will"? Well I look at it this way. In quantum mechanics (or at least the Copenhagen interpretation of it) an "observer" has a special place in the universe. An "observer" isn't an in animate object dead object, the only "observers" in the world are people that have "consciousness". So we humans by "choosing what to observer" force the universe to chose what quantum state to be in. [ame="http://www.youtube.com/watch?v=KOZTPvrhmdc&feature=related"]Schrodinger's Cat - YouTube[/ame] Now maybe our special place in the universe according to quantum mechanics just shows that theory has a flaw, but maybe is also suggests that we really have a "special place" in the universe. We really don't understand that nature of consciousness. For example the electrical activity in the brain at some point runs up against quantum mechanics. It NOT is all "deterministic" chemistry and Newtonian physics. And if some parts of our brains run into quantum mechanics and can be in a "multiple states" at once then something needs to "observer" that multiple state to make it "collapse" into a single state. That requires an "observer" in quantum mechanics. That "quantum mechanical observer" is where we run up against nature of "free will". Until you understand that "quantum mechanical observer" I don't think you can understand free will or consciousness.