Free will and determinism can both be true at the same time

First of all, I believe that Con's definitions of "free will" and "determinism" are incorrect.Free will is clearly not the ability to "do whatever you want." For example, my inability to fly is not evidence that I lack free will. Similarly, I cannot stop my heart from beating, but no one would say that this is evidence that I lack free will. Free will can be defined more accurately as the ability to act at my own discretion.Determinism is also not defined as "you cannot do whatever you want." Rather it is more accurately defined as a situation in which everything that will happen in the future has already been pre-determined and is unchangeable. This is often understood as a situation in which everything has a cause such that if someone understood all the forces acting upon the world and completely understood the exact state that the world is currently in, they could predict everything that will happen in the future with exact accuracy.Let's first discuss what would be necessary to determine whether or a not a person has free will. Basically a person would have to be able to make a decision and act based on that decsion. For example, if I were to decide to wiggle my fingers and then, based on that decision, I wiggled my fingers, that would be sufficient to indicate that I have free will. Having free will does not necessitate that I have complete free will over everything or even all aspects of my own body. Even if I had free will, I could not decide to wiggle your fingers and bring that about. As mentioned earlier, I could also not decide to stop my heart from beating. Therefore free will is limited. However, if I am found to have free will regarding at least one thing, then I have at least some degree of free will.If determinism were true, this would have no effect whatsoever on my free will. Even if someone were able to predict 1000 years ago, long before I was even born, that I would come to exist and at this very moment wiggle my fingers, this does not mean that I did not decide to do it. This is because free will and determinism exist in different universes of discourse.Let us assume that determinism and free will were both true. The forces that drive the universe ended up causing my existence and making me the type of person who would decide to wiggle my fingers at this precise moment. Anyone who was knowledgable enough about the universe could have predicted that this is the decision that I would make. many determinists would argue that I therefore had no choice as to whether I would decide to wiggle my finger, that I was forced into deciding that. This is not true and is in fact nonsense. It is impossible for anything to force me into making a decision I do not want to make. If this were that case, then it would be not be a decision at all. And yet it was a decision. Based on the definition of decision and the definition of me, I very clearly weighed the available options and chose one.To make this clearer, my mind was caused to be a certain way by the universal causes and indeed could not have been any other way. However, once my mind had come into existence, mind exists in a different universe of discourse than that in which the causality happens.For example, if I were to write a computer program that adds 1+1. I write it in such a way that it always makes the correct calculation. No matter how many times I run the program, it always tells me the answer is 2. I can accurately predict before I even run the program the first time that it will tell me the answer is 2. Yet, this program still has its own very limited degree of free will. I did not program it to just output 2. Every time I run it, it actually does the calculation. every single time. It just so happens that every single time, it decides, based on its calculations, that the answer is 2.Human minds are much more complex than this program, of course. However, assuming that determinism is true, someone who know all the "algorithms" and all the input would be able to determine exactly what a person would decide. This is irrelevant, however, because the person (who is operating on a universe of discousre of one's own mind) still has the ability to make his own decisions regardless of the fact that what he will decide can be figured out beforehand.I would like to point out for clarification that anything in here assuming that determinism or free will are actually true are only hypotheticals, and I have not attempted to argue that either is actually true, only that they are compatible. I point this out to ensure my opponent doesn't misunderstand and waste space arguing against the truth of either of these positions.