once you understand biology and neurology, then the only conclusion you can come to us that it is literally impossible for free will to exist. everything you do, say, think or feel is just a response or reaction to some kind of external stimuli. you are also largely shaped by the genetics of your parents. knowing those two things and understanding biology and neurology, it becomes apparent that no individual human has any real control over how their life turns out, nor are they capable of making a decision or having any thought that is truly 100% independent of some kind of outside influence. as such, yes free will is an illusion. it cannot exist. at least not as we currently understand the concept.
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