The phrase, "in the absence of a defeater", is not an argument at all; rather, it is a description of a sufficient epistemic condition that if satisfied, would render a belief rational to hold.
Not at all.
I'll demonstrate with an "explanation":
The origins of the universe are best explained by the extra-dimensional 7-headed dragon laying a cosmic egg, which in the case of 7-headed dragons comes in the form of a singularity of near-infinite mass and energy. When it cracked, it cracked with a big bang and from it, the universe was born. And I know this, because it was revealed to me by one of the heads in a vision.
So, this "explanation" accounts for the origins of the universe and for the big bang. So, if you can't come up with a "defeater" of this, does that mean that it would be rational to accept this claim?
Clearly, not being able to come up with a defeater adds NOTHING.
I'll agree to the opposite though... that holding to a position for which a defeater actually exists... that would be irrational.
The opposite however, is not true at all.
The only things that makes accepting a claim a rational position, is if there is sufficient
positive evidence in support of that claim. The mere absence of a defeater means nothing at all.
A person may know they are innocent of a crime they are accused of committing and yet may not be able to prove they are innocent. The evidence may even be stacked against them, and yet they know they did not do it.
Proving you are innocent, would certainly help your case.
However, it is not a requirement. It is guilt that needs to be demonstrated, since in a court one addresses the question of
guilt, not of
innocense. Which is why a jury will rule "guilty" or "not guilty". And not "innocent".
Having said that, whatever you know or think to know, is not "knowledge" to other people, if you can't demonstrate it.
If you can't show it, then as far as other people is concerned, that which you say you know is no more or less then a claim.
Obviously.... that is the whole point. It IS about others, because this is off course analogy number i-lost-count concerning theism-atheism.
One makes a knowledge claim and the other is responding.
I am the "other" in that conversation. So if you tell me that you "know", I'm going to ask you how do you know. And if you can't give an answer that makes it possible for me to know as well, then as far as I'm concerned, you do not have
knowledge. You have
beliefs and
claims which aren't supported by evidence.
, but to the person in the aforementioned scenario, it would be evidenced to them by their immediate knowledge that they really didn't commit the crime they are accused of committing.
But the whole point is for that person to convince the others of his innocense.........
Are you saying that the others should "just believe" the guy?
Of course people may not believe the accused, but the accused still know that they are innocent.
Let's roll with this one.
Is it possible that this person that is so convinced of his innocense, is actually wrong? That his memory is faulty? That he was under the influence of something (not necessarily voluntarily) and actually just has memory loss?
Let's go to some other people that also really "know" something they can't demonstrate to others: alien abductees. They really really really KNOW that they were abducted and experimented on. Put them on a lie detector test and they will pass.
So what is the value of this kind of "knowledge" that can't be shared, really?
The possibility that I am wrong is not a strong enough defeater for my properly basic beliefs. It is possible I am right.
You're not answering the question.
The question is, IF you are wrong (and you seem to admit that his possibility exists)...
how would you know? How could you find out?
Speaking of logical possibilities, it is possible that I am nothing more than a brain in a vat or a body lying in the matrix; however, the mere possibility that that may be the case is not a strong enough defeater for my beliefs that I am not just a brain in a vat or a body lying in the matrix
lol.... you thought you were scoring points by turning it around, but you just made my case for me.
Replace "we are brains in vats" with "a god exists".
There you go.
Indeed, you are the equivalent of an "atheist" when it comes to a "brain in vat world".
It can't be demonstrated that we are NOT brains in vats, but there is no reason to consider/believe/accept that we are either.
And if some guy would come up claiming that he KNOW that we are brains in vats, you will ask him how he knows and to demonstrate it. Or you won't accept it and assume the guy is wrong for a variaty of potential reasons.
I don't accept theistic claims for the exact same reason.
Wonderfull.
Well this is where a cumulative case for Christianity would come in.
No idea what you mean by that.