Yes, completely. Belief is something we do in our minds. You believe what you believe, I believe what I believe. We might believe many of the same or similar things, but they’re beliefs held by subjects. Hence believing is subjective.
And evidence can change from place to place.
It certainly can. I have often had the experience of being convinced that something is true(I still have milk in my fridge), for reasons that appeared to me very good at the time(I remember only using a little last night and putting the carton back in the fridge), only later to discover that I was wrong or mistaken when I got more evidence(the carton was empty). I would probably have claimed to know that I have milk in my fridge, and I’d then be wrong, and new evidence is what changed my belief.
Of course, the knowledge claim is only as strong or as certain as the evidence that supports it. My memory about last night just isn’t all that good, and/or maybe I’m just not all that good at evaluating how heavy the carton of milk is.
If proof that the knowledge can be justified to an absolute certainty is required for it to constitute knowledge, then nothing can be known. But it’s clear to me that different types of knowledge have different levels of support.
Think of a schizophrenic who has sufficient visual and auditory evidence to claim that all scientists he knows are actually reptilians in human skin suits. Why shouldn’t this qualify as “Knowledge”?
It does. He would claim to know it under my definition, yes.
Isnt it “Truth” that differentiates between false beliefs that one thinks is supported by evidence vis a vis actual facts of reality.
I don’t understand that sentence.
Are you suggesting that knowledge can be decoupled from reality?
Yes. You could claim to know something and be completely mistaken. The knowledge you have can hypothetically all be wrong. You could have a life’s experience of having been born, grown up, and lived in Australia, with billions and billions of remembered and every day accumulating evidences, and therefore claim to know with high degree of certainty that you are in Australia. And yet, you could be a brain in a vat. You could be in The Matrix, so all the things you think you know are actually wrong. You think you know how you were born, you think you know what the speed of light is, you think you know the color of the sky.
And it is possible that you could come to possess evidence that would falsify all your previous beliefs (things you would have claimed you know were true).
All knowledge is tentative and can be overturned with better evidence.