Nope.
Look:
18 Come now, and let us reason together, saith the LORD:
Though your sins be as scarlet, they shall be as white as snow;
Though they be red like crimson, they shall be as wool.
Isaiah 1:18.
From these passages can we come to a full doctrine of salvation as what we have today?
No, we can't. Scarlet sins becoming white as snow, red sins like crimson becoming as wool? How? There's nothing wrong with reasoning this and other things out. We compare Scripture with Scripture. But what if all we had towards understanding salvation and atonement and justification was this passage. Could we do it? Could we reason out the Lord's salvation, because that's the subject matter in Isaiah 1:18. He's talking about salvation here. And it can be reasoned out. But we need more, right? Thank God there is more because He will not leave us comfortless (scratching our heads and stroking our beards.)
You said Adam had no ballpoint pen. I said he was illiterate. Both are reasonable conclusions.
It says in Luke Jesus read from Isaiah 61 and wrote on the ground. It's reasonable to say He was literate, could both read and write. But if someone said Jesus could draw paintings and landscapes. Would that be reasonable? I don't think so. Everything in Scripture is reasonable. The gospel is reasonable. And there's nothing wrong with reason-able conclusions.