I can and I will, but honestly, it has passed the point of being annoying that I constantly have to clarify something that was not unclear in the first place, and that the subject has now become about my being "dead set" on looking at something from a logical perspective.
So here's a different way to ask the same damn question (sorry, but we passed being annoying the third or fourth time I was accused of being stubborn about how I'm handling this topic).
Looking at the Bible chronologically in the order that the stories take place, what is the first inkling that we have that "salvation" or "eternal life" is even a thing? And, following up on that logically, at what point is it clear, Biblically AND chronologically, that there is a "gospel" of salvation that is clearly articulated?
Best answers we have come up with until this point is that there's a reference in Job to the expectation of a life after this one, and there are Psalms that seem to indicate (to my satisfaction at least) that "trusting in the Lord" is what "entitles" (I'm struggling to come up with a better word) a person to eternal life.
I know you can look at certain verses in the New Testament that seem to indicate the people in Genesis knew certain things, but there is nothing in Genesis to reflect that, and the people who lived at the time of Genesis did not have access to the New Testament. Yeah, you can say "God said it, that settles it," but from a historical perspective, that doesn't fly. Answer the question the way a Jew would: They don't accept the New Testament as authoritative the same way Christians don't accept the book of Mormon's claims about Jesus as authoritative or the Koran's claims about Abraham as authoritative.
Where is the gospel of salvation in the OT? If we're going to ask how it's changed, we have to approach it honestly, and that means approaching it chronologically. I'm willing to assume Adam knew the substance of Genesis 3:15 even though he wasn't there to hear that promise (or, at least, there's no indication he was). To deny he knew it would be nitpicking. But Genesis 3:15 says nothing about restoring man to immortality. That promise comes later (at the latest by Job). I'm willing to accept that the people of Genesis had the same expectation as Job even though there's no connection between the stories, again because it fits chronologically and I'm looking at this chronologically. And I say this knowing that Genesis-Deuteronomy were written centuries after the events described and not knowing at all when Job was written. To avoid that argument, I'm taking the timing of the stories AS THEY OCCUR at face value.
What I'm not willing to do is accept that the people of Genesis knew what was written in Hebrews some thousand or two years later. That's ret-conning. It may satisfy the question from a theological standpoint, but it doesn't hold water chronologically.
This should not be difficult. And it's not about ME or my being "dead set" against anything. It's about approaching the material on its own merits and not allowing ANY preconceived notions to take precedence.
Is there a gospel of salvation in Genesis? Where? Exodus? Where? Leviticus? Where? Joshua, Judges, Ruth? Where do we first see the people of God actually believing in something that we can call "salvation" according to how we define it today?