To repeat, the Greek word translated "foreknow" refers to using some information obtained or formulated in the past, in the present. This is its only meaning. To claim otherwise is simply redefining the meaning of "before known"
The claim the word is used only of knowing people and not knowing plans or actions is demonstrated false by Acts 2:23. Christ was delivered up by the predetermined plan and foreknowledge of God. The manner of Christ's death had been predetermined, and recorded in scripture such as Isaiah 53, and therefore when this plan was brought about, it was by the foreknowledge of God. Any other view is simply a denial of scripture.
In Acts 26:5, we see the word used to describe knowledge about Paul, he lived as a Pharisee, they did not see into the future, but rather had knowledge beforehand, when Paul was a youth. So two for two.
In 1 Peter 1:2 we see individuals chosen according to the foreknowledge of God. So God had a plan, a redemption plan, formulated in eternity past, and He is now choosing individuals according to that plan. So three for three.
And then in 1 Peter 1:20 we have Christ being foreknown, IN THE Past, as the Lamb of God, and then in the present, according to plan, He has appeared in these last days for your sake. So we have four for four.
Now the last two lets take together because they are parallel. In Romans 11:2 scripture says, “God has not rejected His people whom He foreknew.” Now what did God know beforehand? They had been chosen corporately. So five for five where the word is used to describe a present action according to prior knowledge.
In Romans 8:29 scripture say, " For whom He foreknew [proginosko], He also predestined to be conformed to the image of His Son, that He might be the first born of many brethren;" Here again Paul uses the word to describe something about people that was known beforehand, in the past. They had been corporately chosen, Ephesians 1:4) and the redemption plan decreed those chosen would be conformed to the image of His Son. So six for six, the exact same usage of the two Greek words, to know something in the past and use that knowledge, i.e. implement the plan, in the present.
Both Calvinism and Arminianism are based on shoddy bible study and rewriting the meaning of the words to get them to somehow support their invented doctrines.