I will just copy and past something that I made when i was thinking this over.

Everything that does currently exist, did exist, or will exist in the future has to operate under the rules of physics that set up the way that the Universe functions. For example, nothing that has mass may go above/at the speed of light, and this physical law may never change [1]. This is not to say, however, that current ideas are the only rules that govern the universe -- we may be wrong about some of our currently held theories and laws [2], because the things that we know are constantly evolving and will change as we progress through the experience that is mankind. What this thinking does is give us the very first premise of my conclusion: P1: The laws of the universe are constant (though our knowledge of them may change) Next, we must examine the idea of probability. People say that rolling a die will have a 1/6 chance of landing on a specific side, but is this really true? The weight of the die, the air colliding with it and bouncing off, how much force was directly applied to the side of the die, which side of the die, etc. all influence which side of the die will land on the top. A way to see this is with the Janken, made by the University of Tokyo [3] (link to a video). This robot sees what is happening around it and decides which type of hand to play, based on all of the previous actions made by the player. You can compare the player to be an external stimulus and the robot to be an observer (perhaps a human). If you look at the external stimulus, you are able to calculate what it will be within a moments notice, and you are able to calculate what will happen in the future. Because the laws of the universe are never changing, we can use this idea to make my next conclusion. If we had an infinite amount of data to compute and to see the future, then we could do this based on what this robot can do. What this does is lead me to my second premise of my conclusion,: P2/C1: Everything is calculable with enough data within the universe (which means that everything will happen in a particular way) [<-- just rephrasing] Now, the definition of 'free will' is as follows: "the power of acting without the constraint of [...] fate", and 'fate' is defined as "be destined to happen, turn out, or act in a particular way" [google definitions]. This leads me to my next logical conclusion: P3: Free will is the power of acting without the constraint of fate P4: Fate is something that is destined to happen in a particular way P5/C2: The universe (and in turn, all of us) have fate bestowed upon us. P6/C3: Nothing in the universe has free will (because everything is fated) C4: Free will does not exist.

[1]. http://www.phys.vt.edu... [2]. http://www.bbc.com... [3]. https://www.youtube.com...