No matter how "severely backslidden" a Christian is, they are still saved End of story.
1Cor 3:15 (AKJV/PCE)
(3:15) If any man's work shall be burned, he shall suffer loss: but he himself shall be saved; yet so as by fire.
End of story.
Ideas have consequences Right Divider, as you well know! Why will you not engage the argument?
On that day, one of three things will happen...
Option 1: She (i.e. a severely backslidden Christian) joyfully embraces God as He truly is
If this is your answer, then you're conceding my core point without realizing it.
By taking this option, you'd be effectively admitting that what matters is not the profession alone, but whether the will ultimately aligns with God’s righteousness once truth is fully revealed. That means the decisive factor is what one loves when the truth is known.
Option 2: She hates God’s righteousness and rejects Him
This answer would explicitly endorse my position by acknowledging that a person can be sealed and delivered, but still refuse fellowship with God when confronted with who He actually is. At that point, the only remaining question is whether God forces eternal fellowship on someone who despises Him...
Option 3: God forcibly alters her will so that she embraces Him
This is the option that I think most Christians implicitly assume without ever admitting it.
This option is the equivalent of saying that love, allegiance, and worship are manufactured by divine fiat, not freely given. That reduces heaven to a kind of moral reprogramming, not a real relationship.
Options 1 & 2 acknowledge my position, either tacitly or explicitly. Option 3 denies free will, which collapses the concepts of love, relationship, righteousness, faith, allegiance, etc. and turns God into either a kidnapper who holds people against their will or Calvin's version of God who alters our will by fiat.
I am reasonably certain that those three options exhaust every rational possibility but, as I said, if you can refute it or show me another option then I'll be happy to read all about it.