I realize that. I'm just making the point that two people can be talking about "knowing' and yet not be talking about the same thing.
Notice that if I ask, "how do you know that Nathan would have stood with the predominant view?" And you answer, "because that was the predominant view". That doesn't really answer the question. It's not a personal attack on you to call it an assumption. I actually like one point that you're making, that sometimes we can think that we have the facts and yet be totally wrong. What's also interesting, is that you pointed out that scripture would be used to support the wrong conclusion.
It's a safe bet. I should have said Copernicus and not Galileo. Galileo came later. But he too challenged the view that not only the Church held, but science as well.
"Galileo, far from being an atheist, was driven by his deep inner conviction that the Creator, who had “endowed us with senses, reason and intellect,” intended us not to “forgo their use and by some other means to give us knowledge which we can attain by them.”
Zondervan. Seven Days That Divide the World: The Beginning According to Genesis and Science (p. 18). Zondervan. Kindle Edition. "
And
"Galileo was attacked for his theory of a moving earth, first by the Aristotelian philosophers, and then by the Roman Catholic Church. The issue at stake was clear: Galileo’s science was threatening the all-pervasive Aristotelianism of both academy and church. The conflict was far more between two “scientific” world-pictures than between science and religion. In the end, Galileo had to “recant” under pressure but still (according to the story) could not help muttering to his inquisitors, “But it does move.”"
Zondervan. Seven Days That Divide the World: The Beginning According to Genesis and Science (pp. 18-19). Zondervan. Kindle Edition.
It's doubtful that any of us would have a view that differed from the Church. And we would have argued that our position was "truth." We'd know it. But we'd be wrong.
You can't know that you don't know (understand) what you don't know. You can be fully convinced something is true or false and be wrong.
We can hold a belief to a certainty. There are things where it's doubtful what I believe is wrong as it make the most sense given the evidence. It's possible to be wrong in these cases, but not probable. For example, the existence of God. Is it possible to be wrong in the belief that God exists? I suppose anything is possible but it's not plausible. Not only do we have His written word, we have the Spirit that testifies to our spirit. But wait, what about unbelievers? They have the creation that tells them God exists. So much so that they are without excuse for their unbelief. Romans 1:20
We can be sure of many things we believe. But not all. That's a logical impossibility. Experience tells us that. We've been wrong in the past.
Case in point is OSAS: One person says yes and the other says no. There's only one correct answer. Just because you hold strongly to one side or the other doesn't make you right. Just because you believe it to to true (whatever your position is) doesn't mean it is so. The world is full of people who believe things that are completely untrue. And they don't/can't know the difference.