Foreknowledge Based on Foreordination: God's foreknowledge, according to the Scripture teaching, is based upon His plan or eternal purpose, which embraces everything that comes to pass. God is never represented as a mere onlooker seeing the future course of events, but having no part in it.
All I have to do is find one example that doesn’t match this person’s definition to prove it wrong.
2 Kings
20 In those days Hezekiah was sick and near death. And Isaiah the prophet, the son of Amoz, went to him and said to him, “Thus says the Lord: ‘Set your house in order, for you shall die, and not live.’ ”
2 Then he turned his face toward the wall, and prayed to the Lord, saying, 3 “Remember now, O Lord, I pray, how I have walked before You in truth and with a loyal heart, and have done what was good in Your sight.” And Hezekiah wept bitterly.
4 And it happened, before Isaiah had gone out into the middle court, that the word of the Lord came to him, saying, 5 “Return and tell Hezekiah the leader of My people, ‘Thus says the Lord, the God of David your father: “I have heard your prayer, I have seen your tears; surely I will heal you. On the third day you shall go up to the house of the Lord. 6 And I will add to your days fifteen years.
God had foreknowledge of Hezekiah’s impending death - but it was subject to change.