Can we know that something doesn't exist?

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Zetherin
 
Reply Fri 5 Mar, 2010 12:12 pm
@hue-man,
Night Ripper wrote:

Why isn't true belief enough for knowledge? Because that wouldn't rule out lucky guesses. True beliefs have to be obtained in the right way. What is the right way? Any way that gives true beliefs. But guessing does give true beliefs sometimes. So it has to be better than 50%. But that includes 51% which is almost as bad as chance. Is that knowledge? At what point does it tip the scale and become knowledge? Why is it that whatever you say will seem arbitrary? If there is no clear line then why hold to the distinction that there is even such a thing as knowledge rather than various degrees of probably true beliefs?


Though the line is not clear, (and particularly, it is not clear concerning the acquisition of justifiction, that is, at what point in time in the "knowing process" is one considered justified), it doesn't make much sense to me to consider lucky true beliefs, knowledge. This is because if we were to consider lucky true beliefs knowledge, we would be dismissing reason entirely; an educated guess would be no different than a lucky guess, and an educated person in X field would have the same understanding as an uneducated person who speaks about X field. If we deny reason in this matter, we are denying that some people are more knowledgable at certain things than others, and we are denying that the learning process is valuable.

Even if you find justification problematic, I think most reasonable people will admit that not every belief is the same. It is obviously clear to me that sometimes people believe things for bad reasons, while sometimes people believe things for good reasons. If we say there is no connector piece between truth and belief, we are essentially saying logic and reason have no bearing on why we should hold beliefs, and that, I think, would be being unreasonable.
 
Night Ripper
 
Reply Fri 5 Mar, 2010 12:32 pm
@Zetherin,
Zetherin;136532 wrote:
Though the line is not clear, (and particularly, it is not clear concerning the acquisition of justifiction, that is, at what point in time in the "knowing process" is one considered justified), it doesn't make much sense to me to consider lucky true beliefs, knowledge.


I agree. I have a problem with 50%. That's why I also have a problem with 51%. I was asking you at what point should I start to feel comfortable but you didn't answer.

Zetherin;136532 wrote:
Even if you find justification problematic, I think most reasonable people will admit that not every belief is the same. It is obviously clear to me that sometimes people believe things for bad reasons, while sometimes people believe things for good reasons.


What does that have to do with what we call knowledge though? I already agree that empirical evidence is better than random guessing but why must I call such beliefs knowledge rather than precisely what they are?
 
Zetherin
 
Reply Fri 5 Mar, 2010 12:43 pm
@hue-man,
Night Ripper wrote:

I agree. I have a problem with 50%. That's why I also have a problem with 51%. I was asking you at what point should I start to feel comfortable but you didn't answer.


Oh, well, that is a personal question. One which I would not be able to answer for you. To steal a post from kennethamy, which I find relevant:

kennethamy wrote:

The British philosopher, Harry Prichard, was known for never saying he knew and saying, instead, "I strongly believe", just as he would never say, "I promise (to do so-and-so)" and saying instead, "I fully intend (to do so-and-so". And for the same reason. He did not think he could be certain that he knew, and he did not think he could be certain that he would perform his promise. But, of course, it made no difference, since people would just translate, "I strongly believe" into "I know", and "I fully intend" into, "I promise", and indulge Prichard in his little curlicues.


It depends on your own personal comfortability regarding this matter.

Night Ripper wrote:

What does that have to do with what we call knowledge though? I already agree that empirical evidence is better than random guessing but why must I call such beliefs knowledge rather than precisely what they are?


You can call them what you will, I suppose. As long as you make the distinction between a justified (call it what you will) belief, and a belief that is not justified. There is a big difference.
 
Night Ripper
 
Reply Fri 5 Mar, 2010 12:58 pm
@Zetherin,
Zetherin;136538 wrote:
since people would just translate, "I strongly believe" into "I know"


But when I finally say "I know" and mean it, what will you translate that into? I know 1 + 1 = 2. I don't just "strongly believe" it.

It seems you would erase this distinction completely.
 
Pyrrho
 
Reply Fri 5 Mar, 2010 01:07 pm
@Zetherin,
Zetherin;136532 wrote:
Though the line is not clear, (and particularly, it is not clear concerning the acquisition of justifiction, that is, at what point in time in the "knowing process" is one considered justified), it doesn't make much sense to me to consider lucky true beliefs, knowledge. This is because if we were to consider lucky true beliefs knowledge, we would be dismissing reason entirely; an educated guess would be no different than a lucky guess, and an educated person in X field would have the same understanding as an uneducated person who speaks about X field. If we deny reason in this matter, we are denying that some people are more knowledgable at certain things than others, and we are denying that the learning process is valuable.

Even if you find justification problematic, I think most reasonable people will admit that not every belief is the same. It is obviously clear to me that sometimes people believe things for bad reasons, while sometimes people believe things for good reasons. If we say there is no connector piece between truth and belief, we are essentially saying logic and reason have no bearing on why we should hold beliefs, and that, I think, would be being unreasonable.



If you will allow a homely analogy, when one gets enough justification is a bit like when one gets enough dirt to have a mountain. It is not a precisely measured amount, but that does not mean that there is no difference between a mountain and a mole hill.
 
kennethamy
 
Reply Fri 5 Mar, 2010 01:10 pm
@ughaibu,
ughaibu;136295 wrote:
Are you saying that physical impossibility is a matter of personal belief?


No, why do you think that?
 
Zetherin
 
Reply Fri 5 Mar, 2010 01:11 pm
@Night Ripper,
Night Ripper;136541 wrote:
But when I finally say "I know" and mean it, what will you translate that into? I know 1 + 1 = 2. I don't just "strongly believe" it.

It seems you would erase this distinction completely.


What distinction am I erasing completely?
 
Night Ripper
 
Reply Fri 5 Mar, 2010 01:14 pm
@Pyrrho,
Pyrrho;136547 wrote:
If you will allow a homely analogy, when one gets enough justification is a bit like when one gets enough dirt to have a mountain. It is not a precisely measured amount, but that does not mean that there is no difference between a mountain and a mole hill.


Your analogy introduces too many terms. I'm interested in the difference between being a mountain and not being a mountain. If you insist that there is a difference between mountain and not-mountain but can't give objective grounds for it, what am I supposed to take that to mean? That mountains are subjective? Is that what justification is as well?
 
kennethamy
 
Reply Fri 5 Mar, 2010 01:14 pm
@Zetherin,
Zetherin;136551 wrote:
What distinction am I erasing completely?


Or even partly......
 
Night Ripper
 
Reply Fri 5 Mar, 2010 01:16 pm
@Zetherin,
Zetherin;136551 wrote:
What distinction am I erasing completely?


The distinction I just made. The distinction between "I know" and "I strongly believe". I asked you a question. You didn't answer. What will you translate "I know" into when I say it?
 
kennethamy
 
Reply Fri 5 Mar, 2010 01:21 pm
@Night Ripper,
Night Ripper;136554 wrote:
The distinction I just made. The distinction between "I know" and "I strongly believe". I asked you a question. You didn't answer. What will you translate "I know" into when I say it?


"I have justified true (strong) belief". The belief has to be justified and true.
 
Zetherin
 
Reply Fri 5 Mar, 2010 01:22 pm
@Night Ripper,
Night Ripper;136552 wrote:
Your analogy introduces too many terms. I'm interested in the difference between being a mountain and not being a mountain. If you insist that there is a difference between mountain and not-mountain but can't give objective grounds for it, what am I supposed to take that to mean? That mountains are subjective? Is that what justification is as well?


Just because we cannot precisely describe what a mountain is, does not mean mountains do not exist. As Wittgenstein pointed out, just because we cannot derive an all-inclusive definition for "game", does not mean that we don't know what "game" means, or that we use the word incorrectly in sentences. Games still exist, we know what they are, and we can use the referent term correctly in sentences.

Sometimes it is best to start at what something is not, to find out what something is. Justification is not, for instance, the result of a wild guess. Justification is not, for instance, a result of begging the question or using circular reasoning. And so on and so forth.
 
Night Ripper
 
Reply Fri 5 Mar, 2010 01:26 pm
@Zetherin,
Zetherin;136562 wrote:
Just because we cannot precisely describe what a mountain is, does not mean mountains do not exist.


Who claimed that mountains do not exist?

I'm still waiting for you to answer my previous question.
 
Zetherin
 
Reply Fri 5 Mar, 2010 01:28 pm
@hue-man,
Night Ripper wrote:

I'm interested in the difference between being a mountain and not being a mountain.


If you are interested, then read the rest of what I just posted (#252). That is how we should start distinguishing justification from not justification.

Quote:

I'm still waiting for you to answer my previous question.


What question did I not answer? :listening:
 
Night Ripper
 
Reply Fri 5 Mar, 2010 01:33 pm
@Zetherin,
Zetherin;136567 wrote:
What question did I not answer? :listening:


You quoted:

Zetherin;136538 wrote:

Quote:

Originally Posted by kennethamy
The British philosopher, Harry Prichard, was known for never saying he knew and saying, instead, "I strongly believe", just as he would never say, "I promise (to do so-and-so)" and saying instead, "I fully intend (to do so-and-so". And for the same reason. He did not think he could be certain that he knew, and he did not think he could be certain that he would perform his promise. But, of course, it made no difference, since people would just translate, "I strongly believe" into "I know", and "I fully intend" into, "I promise", and indulge Prichard in his little curlicues.
It depends on your own personal comfortability regarding this matter.


Then I asked:

Night Ripper;136541 wrote:
But when I finally say "I know" and mean it, what will you translate that into?


Your answer?
 
Zetherin
 
Reply Fri 5 Mar, 2010 01:37 pm
@hue-man,
Night Ripper wrote:

Your answer?


I would translate that to: You are certain about what you think you know. At least on this forum, since I do not know who you are, and I do not know how educated you are.

Some of my friends say "I know" all the time and mean it, and yet I know that they don't know (because I know more about the subject than they do). But there are other times when people say "I know" and mean it, and I think there is a much higher chance that they do know. That is, I believe that they know.
 
Night Ripper
 
Reply Fri 5 Mar, 2010 01:52 pm
@Zetherin,
Zetherin;136572 wrote:
I would translate that to: You are certain about what you think you know.


Alright, so you're not disagreeing with me? You're just translating everything I say into different words that mean the same thing?
 
Zetherin
 
Reply Fri 5 Mar, 2010 01:59 pm
@Night Ripper,
Night Ripper;136578 wrote:
Alright, so you're not disagreeing with me? You're just translating everything I say into different words that mean the same thing?


I'm going to say a few things, and you tell me which things, if any, you disagree with.

1.) Humans can know things.
2.) There are times when we should feel certain that someone knows something.
3.) Whether or not what you claim to know, is a personal matter. And it is has no bearing on whether you actually know.
4.) Just because we cannot precisely and all-inclusively describe what justification is, does not mean there isn't a difference between a justified belief and a belief which is not justified.

If you don't disagree with any of these, then no, I don't think we disagree.
 
ughaibu
 
Reply Fri 5 Mar, 2010 05:11 pm
@kennethamy,
kennethamy;136550 wrote:
ughaibu;136295 wrote:
Are you saying that physical impossibility is a matter of personal belief?
No, why do you think that?
Because you have given no general account of how to recognise physical impossibility and the specific example, introduced by you, apparently rests on your belief.
 
kennethamy
 
Reply Fri 5 Mar, 2010 05:16 pm
@ughaibu,
ughaibu;136647 wrote:
Because you have given no general account of how to recognise physical impossibility and the specific example, introduced by you, apparently rests on your belief.


That it must be that what is actual is possible is a theorem in modal logic. So it can be proved. But, isn't it intuitively obvious? It is not because I believe it that I believe it is true. It is because I believe it is true, that I believe it.
 
 

 
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