i dont think our mind sifts through all the causes and effects since our birth. When i asked to analyze the causes and effects, i was pointing out that all the actions we have performed are results of these causes and effects. Our mind doesnt necessarily sift through all of them.
what i am saying is that at a certain moment in time, there is a series of causes that pushes us towards one path whether our mind is conscious of it or not. Of course these chains of causes and effects are very complex, and thus we feel that it is unpredictable. This is what creates the illusion of free will. But at a purely objective level, i doubt free will exists.
Again i ask you to analyze what happens when you think of something. Try to pinpoint the point in time where you choose. Whatever choice you will make, you were pushed into by a cause.
But that's just it: what cause pushed me into this choice, right at this moment? Why am I replying to you, rather than smoking a cigarette or going to another forum, two things I also wish to do at this moment? Why have I not gotten up to go to the bathroom, or gotten myself something else to drink? Why aren't I wearing my slippers? Why aren't I playing Grand Theft Auto, or kissing my wife?
All of these are things I want to do right now. I'm sure I could follow out the chains of cause and effect that led me to want these things, to enjoy these things. But there are many things that I enjoy, and many things that I don't, and at any given moment, I have to choose between thousands of them. Assuming that all of my preferences were built on similar chains of cause and effect, things that have occurred in my life since I was born, there may very well be millions of causes clamoring through me for their effects, right now, at this moment.
I don't disagree that our preferences are built on past experiences and sensations, and thus our actions are the effects of certain causes, but we have too many experiences, too many wants and needs and fears, for them all to be satisfied at the same time. There is a mechanism by which we choose which need to satisfy, which chain of cause and effect to follow, at any given moment -- and that is our free will. I do not believe that this mechanism, too, is the simple result of cause and effect; I don't think that there can be a set of experiences I have had that could set all of my other preferences into a specific order, an order which changes from moment to moment. As complex as the human mind is, I just don't believe it could be that complex: to add an order of magnitude to the millions of moments that have influenced my life to this present state? That there is a chain of cause and effect that can sort through billions of wants, needs, and fears and organize them instantly, flawlessly, endlessly -- and never randomly? I don't believe that. I think it much more likely that my past experiences have created a gestalt, an overmind of sorts; a conscious personality which can analyze the various signals coming from the senses and then sift through the millions of possible urges that would serve as the best response to those signals. A free will.
Now, if you'll excuse me, I'm off to satisfy my other needs -- though I haven't decided in which order, yet.