When discussion turns from topic to trampling God's witnesses, not much mystery needs to be revealed.
Consider when individuals are individually chosen for salvation.
Viewpoint one: Before creation per
Ephesians 1:4
Viewpoint two: During our lifetime after our faith is credited as righteousness.
Number of verses supporting Viewpoint One: One
Number of Verses supporting Viewpoint Two: Numerous
1) We were chosen when we were poor to the world, or in the opinion of humanity. Thus after creation.
2) We were chosen to shame the wise and strong things of the world. Thus after creation.
3) We were chosen through faith in the truth, thus after we had heard and learned God's word. Thus after creation
4) Once we were not a people, thus after we were created, then we were chosen as God's people.
5) Once we had not received mercy, thus after we were created, then we received mercy.
6) Once we were not beloved, thus after we were created, then we become beloved children of God.
7) We were chosen from or since the beginning, not before the beginning of creation.
8) Names were not written in the Lamb's book of life, and presumably others written, from or since creation.
But how do you get around
Ephesians 1:4?
God chose His Redeemer, His Lamb of God, before the downfall of humanity, because God arranged for the downfall, thus anticipated the downfall when He chose His Redeemer to redeem believers before the anticipated Fall. His Redemption plan was predetermined, again before the downfall of humanity, which again included both His Redeemer, and His target group of those to be redeemed, those whose faith in His Redeemer would be credited as righteousness. Thus God chose "us" [the redeemed audience of Paul] corporately, when He chose Christ to be the Redeemer. You do not choose a Redeemer without also in effect choosing corporately those the Redeemer would redeem.