If YOU don't know, and someone is confident in their answer, you can't possibly know if they know for sure or not.
And when someone else who DOES know disagrees, how do you know which one is lying? You don't! You can only go by who SOUNDS more right, and that is often manipulated by what you wanted to believe before the conversation even started!
Tags like "original source" and "number of iterations from original source"
("Iterations" probably isn't the right term. If Bob saw it, then Bob told Sally, then Sally told Frank. Frank has "3rd iteration" knowledge. But what's the better term?)
I've literally told a story of something that happened to me, just to have that person say that it happened to THEM and I'm just remembering the time they told me about it.
That's a damn good point. It could be chat bots talking to chat bots all the way down and we'd never know the difference.
This is a quality of the kind of knowledge we deal in here. Compared to first-hand experience, it is a lesser quality of knowledge. A trashy knowledge if you will.
We don't even know if you even read about it. Unless I have experience of what you're talking about, I can't say you're wrong. Heck, even if I have experience, I don't know that you didn't just have a different experience.
You can find a good source for your claims, or some supporting evidence, or someone else can come along and back you up. I still wouldn't know, given how easily you can fake sources on the internet, so you could still be lying.
At a certain point, you just need to take it on faith.
Are you talking about someone who’s deliberately claiming to have experienced something they only read about, or someone who’s genuinely uncertain of their own memories?
I mean if I tell you about the taste of a peanut butter sandwich, how do you tell whether I actually ate a peanut butter sandwich? Or I just read about a peanut butter sandwich??
I mean presumably you could just ask 'how do you know that?'. But also whats to say you arent just making it up in the first place and have never had peanut butter. Thats why you should be critical of information and find trusted sources.