if God can look into the future and see that a person #1 will come to Christ and that person #2 will not come to faith in Christ, then those facts are already fixed, they are already determined. God's foresight of believers' faith and repentance implies the certainty, or "moral necessity " of these acts, just as much as a sovereign decree. "For that which is certainly foreseen must be certain." (R.L.Dabney)

If we assume that God’s knowledge of the future is true (which evangelicals all agree upon), then it is absolutely certain that person #1 will believe and person #2 will not. There is no way their lives could turn out differently than this. Therefore it is more than fair to say that their destinies are still determined, for they could not be otherwise. The question is, by what are their destinies determined? If God Himself determines them then we no longer have election based on foreseen faith, but rather on God's sovereign will. But if God does not determine their destinies then who or what determines them? Of course no Christian would say that there is some powerful being other than God controlling people’s destinies. Therefore the only possible alternative is to say they are determined by some impersonal force, some kind of fate, operative in the universe, making things turn out as they do. But of what benefit is this? We have then sacrificed election in love by a personal and compassionate God for a kind of determinism by an impersonal force and God is no longer to be given the ultimate credit for our salvation. (Wayne Grudem, Systematic Theology)