Pastor Jeff Grupp is the founder of Kalamazoo Jail Ministry, inside the Kalamazoo County Jail. He is the author of Hyper-Calvinist Universal Salvation, which proposes that the Bible indicates that the lake of fire is equal to God, who is also called the consuming fire, and these are the same as the fire referred to in the Bible that will consume and destroy all things at the end of the world. Grupp is also the author of several academic articles, including one that purports that simulation theory proves the existence of God.



References

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Hyper-Calvinist Universal Salvation: The Systematic Theology of the Unchosen Saved by the Lake of Consuming Fire at the Eschaton, Eugene: Wipf & Stock Publishers, 2024.

“The Implantation Argument: Simulation Theory as a New Proof for the Existence of God,” Metaphysica, Vol 22, #2, 2021, 189-221.