[restornu]

Meaning that even God could not save them, or that they refuse to be saved?

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John 17
12 While I was with them in the world, I kept them in thy name: those that thou gavest me I have kept, and none of them is lost, but the son of perdition; that the scripture might be fulfilled.

[malakhi]

John 17 12 While I was with them in the world, I kept them in thy name: those that thou gavest me I have kept, and none of them is lost, but the son of perdition; that the scripture might be fulfilled.

I always thought that this referred to Judas.