After becoming a parent, I related this to my youngest child climbing the so-called-no-climb-fence. The design merely slowed her down until I could race out the backdoor and nab her before she got to the top, usually.
It didn't take Divine omniscience to know what would happen should I fail, and my knowledge of the outcome, did not alter her freedom to choose. Same with God and us, except on a much higher scale.
This thought leads me to the idea of praying for someone's conversion, or change in behavior. What happens to free will in that instance? Do we, or God, force the person to act against their will? Of course not. This is where the power of Divine persuasion comes into play.
