I figured you did, but was amazed that you failed to recognize the 'if-else-else' statement (or whatever it was, I don't remember exactly) in a scriptural passage we were discussing. I didn't bother to correct you. Nobody but you and I would be able to follow the discussion.
But anyway, you've written way too much to take the time to read through carefully and thoughtfully and test. That's why I didn't read the post you linked to the first time.
You're making this way too difficult. But I do know from my own experience that's what one has to do to make a passage of scripture not mean what it so plainly says. I've repented of doing that. I don't defend popular doctrines just because the majority has bought into it and somehow the church as a whole is supposed to defend it as part of their Christian duty. When what is believed by the whole is wrong, I won't defend it anymore out of a sense of misguided loyalty.
This is simple:
"1 Now I make known to you, brethren, the gospel which I preached to you, which also you received, in which also you stand, 2 by which also you are saved, if you hold fast the word which I preached to you, unless you believed in vain. " (1 Corinthians 15:1-2 NASB)
They will be saved if they hold fast the word that was originally preached to them. Simple enough. No interpretation needed there. You have to hold fast the word that was preached to be saved by that word. You don't need a Master's degree in anything to understand that.
But then he adds 'unless you believed in vain'. OSAS says this means they didn't really believe when they heard the message, but rather had a vain (useless) believing that didn't save them, even though Paul plainly tells them they did receive the gospel (vs. 1), are now standing in it (vs. 1), and believed it (vs. 11). So we have to ask ourselves, "what does Paul mean about this belief, which they surely do have (he said so), potentially being in vain?" We learn that from what he explains next.
He goes on to explain to them that if Christ has not been raised from the dead, that is a gospel that can not save. Perhaps someone will argue that it doesn't matter what they believe about the resurrection of Christ, just that they are saved by the gospel of Christ. But the resurrection of Christ IS the gospel that saves. To change that to a gospel that does not have that element of his resurrection in it is to have a vain belief that can not save, not a belief that can save but just needs tweaking in regard to whether it's really true that Christ rose from the dead, or not. It is an essential belief of the gospel that one must have, and retain, in order to be saved through faith in that gospel:
"9...that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved;" (Romans 10:9 NASB)
He's saying to the Corinthians, "you stand....unless you have believed in vain by removing the essential element of 'believing in your heart that God raised Jesus from the dead'".
A gospel message that does not retain this essential truth can not save you, and will even make your previous believing that did include it vain and useless and now unable to save.