Have you ever heard of theoligical determinism and compatibilism?
There are many possible positions one could take on the issue of free will.
The one used by Judeo-Christian religions is the above.
To explain, God is omniscient, period. We have free will, period. They do not cancel each other out.
It is not hard to grasp, really. There have been examples in court cases where a lawyer has argued determinism as a way to exonerate a prisoner. If all things are naturally GOING to happen, are they predetermined by NATURE? Or do we dictate to an extent what DOES happen? We don't need to even bring God into the picture to see that this type of reasoning will probably not get the guilty pardoned.
You are probably not going to like this answer; at the least it will only provoke more questions. But...
Does he or does he not already have your life scripted out before he creates you? If he doesn't then he doesn't know what will happen.
I was going to ask you to clarify your previous post, but Phat ended up taking it in that direction anyway.
The problem is; there is no before and no after to God. It is all NOW. Make sense? Probably not. Still, it is an accepted theological concept. God's creating, and God's knowing, are simultaneous events. There is no need for a chronological sequence of events or cause = effect reasoning.
If it is all "now" to god then it still is an issue of creating knowing what is happening...now or future doesn't matter.
I could turn this into an endless conundrum, but why can't God in one second set in motion His creation, and know in that very second what the eventual outcome will be, without actually choosing the outcome?
If you are created with the eventual outcome known by your creator then how can you have free will. You will do what you are scripted to do, what is already known you will do.
That 'eventual outcome known by your Creator' is a paraphrase of omniscience, or theological determinism. The answer is not getting any more or less complex in lieu of any paraphrasing; it is still a matter of our having free-will 'in time' and an omniscient God outside of time.
First off you assume that people haven't read Lewis. Second, it is "merely" an apologetic. Something pulled out of a hat in an attempt to explain a conundrum.
This is as I said before only one 'solution'. There is also nondeterminism in which there is no omniscient being or non-compatibilism in which we have no free will because of an omniscient being. There are many variations, some of which have nothing to do with God, but with the laws of nature.
As per the OP, which assumes an omniscient being, and asks HOW we can have free will, this is a 'solution' which of course did not originate with Lewis, although he explains it well.
ABE; I am calling this 'a' solution, but as far as I know there is no other theological concept...of course non-testable and all that so not a true 'solution'...which better explains the conundrum.