i never said Abram knew all the details of the crucifixion and resurrection.
for several years i have been consistently telling you that seeing and understanding all details of the good news salvation is not the requirement for whether "the gospel" singular has been heard and proclaimed.
you say 'progressive revelation' -- but that the person and nature of God has been progressively revealed to mankind over time does not mean that every time a new facet of the knowledge of Him is revealed that there is another god. this is how you reason and preach, however, with your 'multiple gospels' nonsense.
if progressive revelation meant what you teach it means, then it makes the Bible a book of polytheism where all its many gods are liars, just as you would make Christ a liar when He says there is no other way and no other Truth but Him.
But the cross is the gospel that Paul was referring to in Galatians 3
You cannot have your cake and eat it. If you want to insist that The gospel is singular, it must refer to the cross
To me, gospel means good news. God released various good news to mankind throughout his dealings with them.
As Long as man during each time believe in that specific good news God tells them, he considered that as faith in him.
But as Paul reminded us in Galatians 3, which you love to wave at me, the only gospel that saves now is about the cross
How do we show faith in him now? Believe in 1 cor 15:1-4
That is what progressive revelations means to me