As I said before, truth is not a function of consensus. Just because there can be a dispute over truth doesn't show there's anything weird going on here.
As much as I appreciate the polite tone of this latest message, I still need to press you for an answer to my question. You say that truth is not a function of consensus. So I ask again: How do we decide what is true? It's an important question. Really, really important in any discuss about knowledge, especially when someone is using the 'justified true belief' definition.
I mean, we cannot know anything at all unless we figure out how to decide whether a thing is true, yes? So if truth is not a function of consensus, how is truth decided?
Truth J = "Jesus physically rose from the dead, was God incarnate, and waits in Heaven for those who call Him Lord."
Truth C = "The cat is on the couch."
Let's say that 99.9% of the humans in your town proclaim both of these statements to be true.
But you've said that consensus doesn't determine truth, so I guess it really doesn't matter how many people proclaim the truth of these two truths. Yes? We can't declare that either Truth J or Truth C is true, not based on the 99.9% consensus.
So how do we decide which of these truths are actually true? Please tell me.
True statements are those that reflect facts/reflect reality.
And snakes swallow their tails. Really, don't you recognize a tautology when you recite one?
A 'fact' is a 'true thing.' A 'true thing' is a 'fact'.
Notice that your claim is couched not in the passive voice, but close. It has a non-human subject/actor. But in real life, statements can't actually reflect facts at all. One must have a human in the room. Truth requires a judge. A human judge.
So what you must say is something like this: "I can determine true things from false things by judging whether a statement actually reflects facts and reality."
Or, "A group of wise elders can determine true things from false things by judging whether a statement actually reflects facts and reality."
Or, "A prophet of God can determine true things from false things by judging whether a statement actually reflects facts and reality."
I need to know: Who exactly -- what person -- decides whether a thing is true or whether it's false?
You? Each of us? A consensus? A prophet of God?
Who can tell me whether a thing is true or whether not?
So no matter who thinks what, whether "the cat is on the couch" is true depends on the fact of the matter (i.e. the location of the cat). Do we sometimes have difficulty determining what the fact of the matter is? Of course. But you're
overstating your case- whether "the cat is on the mat" is true can be settled by looking at the couch, and most cases of truth or knowledge are equally straightforward (do a mental brainstorm of all the things you know are true- the majority of them are pretty simple to verify).
I'm going to declare you mistaken in various ways. First, you've chosen the most extreme case in all of Truthland as your example -- human vision being our most trusted physical sense. Second, despite what you assert, most truth claims are not of the let's-check-our-vision sort. Third, what if 65% of your fellows declare there is no cat on the mat but you yourself are sure that you see a cat on the mat. You can't give up your truth claim in the face of a consensus against you, so what do you do? You declare yourself the final arbiter of truth, don't you? What other option is there.
In any case, 100% certitude or infallibility is a false standard- truth and knowledge depend on having an appropriate amount of evidence relative to the context and the claim in question. That we could one day turn out to be mistaken doesn't preclude us having knowledge or the truth. Truth and knowledge are open-ended.
So when we claim to know things, it's possible that the things we know are not true?
But I've been saying that from the start. It's why I find the 'justified true belief' thing to be nonsense.
You are now saying that we can know things which might not be true. But earlier you insisted that we could not know untrue things.
This debate business is harder than it looks, eh?