We reason on time as flowing, as a linear thing. Time is a volume. Eternal existence is existence not on a linear scale but a volume, always present, never past and never future, always in the present, eternal in existence. Eternity is the volume of Time.
Put in a more modern framework, the 'information' of being is not lost, it resides in the volume of Time. Even Stephen Hawking is beginning to get it, since he has backed off on his earlier notion of a black hole collapsing infinitely, with nothing escaping. That's why I write that a black hole is a fair though not perfect analogy.
If it is not the eternal spirit of a man which is in torment, what is it?
Regarding the rest of your post, it is hypothesis.
BTW, I read the first of your three links in a previous post. You are being too smart by half. I’m considering taking the time to refute the red herrings, straw men and contradictions, but I’ve barely the time to post what I’ve posted so far.
I’ve read my share of incredibly lengthy and sometimes well produced documents both in and out of Christianity that make very clear and well defended points that fall apart when exposed to the other side’s position. I was intimidated by your post until I actually read it.