You are presupposing the world has certainty, and only are concerned with our ability to derive that certainty (or answers).
Yes. The vial is either poisoned or it isn’t, and my task is to decide whether to drink it or not. Do you deny that?
In that model, looking for the “best system” to find answers makes sense.
Yes, I agree. Indeed, looking for systems to find answers that are better than the one I’m using makes sense, even if they aren’t best, even if I can’t ever know whether they are best or not.
I am proposing that there are issues for which answers do not necessarily exist,
Sure. But “which vial is poisoned?” isn’t one of them. More generally, there are millions of issues we face in our lives for which answers exist, and productive techniques for approaching those questions are worth exploring and adopting.
Immediately before the vial is chosen, the only relevance of the Truth (referring to actual truth) is the extent to which the people and I believe something consistent.
This is where we disagree.
Which vial contains poison is a fact about the world, and there are a million other contingent facts about the world that go one way or another depending on it. Maybe the air around the vial smells a little different. Maybe it’s a different temperature. Maybe the poisoned vial weighs more, or less. All of those contingent facts means that there are different ways I can approach the vials, and if I approach the vials one way I am more likely to live than if I approach the vials a different way.
And if you have a more survival-conducive way of approaching the vials than I and the other 999 people in the room, we do better to listen to you than to each other, even though your opinion is inconsistent with ours.
thus I am arguing that the only relevance of Truth is the extent to which humans agree with it.
Again, this is where we disagree. The relevance of “Truth” (as you’re referring to it… I would say “reality”) is also the extent to which some ways of approaching the world (for example, sniffing the two vials, or weighing them, or a thousand other tests) reliably have better results than just measuring the extent to which other humans agree with an assertion.
In your example, immediately after the vial is taken—we find out we’re right or wrong—and our subjective truths may change.
Sure, that’s true.
But it’s far more useful to better entangle our decisions (our “subjective truths,” as you put it) with reality (“Truth”) before we make those decisions.
With respect to your example, I can only play with those facts that you have given me. In your example, I assumed that knowledge of which vial has poison could not be known, and the best information we had was our collective beliefs (which are based on certain factors you listed). I agree with the task at hand as you put it, but the devil is of course in the details.
Which vial contains poison is a fact about the world, and there are a million other contingent facts about the world that go one way or another depending on it. Maybe the air around the vial smells a little different. Maybe it’s a different temperature. Maybe the poisoned vial weighs more, or less. All of those contingent facts means that there are different ways I can approach the vials, and if I approach the vials one way I am more likely to live than if I approach the vials a different way.
But as noted above, if we cannot derive the truth, it is just as good as not existing. If the “vial picker” knows the truth beforehand, or is able to derive it, so be it, but immediately before he picks the vial, the Truth, as the vial picker knows it, is of limited value—he is unsure and everyone around him thinks hes an idiot. After the fact, everyone’s opinion will change accordingly with the results. By creating your own example, you’re presupposing (i) an answer exists to your question AND (ii) that we can derive it -- we don’t have that luxury in the real life, and even if we have that knowledge to know an “answer” exists, we don’t know whether the vial picker can accurately pick the appropriate vial based on the information available.
The idea of subjective truth (or subjective reality) doesn’t rely solely on the fact that reality doesn’t exist, most generally it is based on the idea that there may be cases a human cannot derive what is real even where there is some answer. If we cannot derive that reality, the existence of that reality must also be questioned. We of course don’t have to worry about these subtleties if the examples we use assume an answer to the issue exists.
The meaning of this is that rationality in my mind is helpful only to the extent (i) an answer exists and (ii) it can be derived. If the answer to (i) and (ii) are yes, rationality sounds great. If the answer to (i) is no, or the answer to (i) is yes but (ii) is no, rationality (or any other system) has no purpose other than to give us a false belief that we’re going about things in the best way. In such a world, there will be great uncertainty as to the appropriate human course of action.
This is why I’m asking why you are confident the answer to (i) is yes for all issues. You’re describing a world that provides a level of certainty such that the rationality model works in all cases—I’m asking why you know that amount of certainty exists in the world—its convenience is precisely what makes its universal application suspect. As noted in my answer to MugaSofer, perhaps your position is based on assumption/faith without substantiation, which I’m comfortable with as a plausible answer, but not sure that is the basis you are using for the conclusion (for the record, my personal belief is that any sort of theory or basis for going about our lives requires some type of faith/assumptions because we cannot have 100% certainty)
rationality in my mind is helpful only to the extent (i) an answer exists and (ii) it can be derived.
Or at least approximated. Yes.
If the answer to (i) and (ii) are yes, rationality sounds great.
Lovely.
If the answer to (i) is no, or the answer to (i) is yes but (ii) is no, rationality (or any other system) has no purpose other than to give us a false belief that we’re going about things in the best way
I would say, rather, that it has no purpose at all in the context of that question. Having a false belief is not a useful purpose.
This is why I’m asking why you are confident the answer to (i) is yes for all issues.
And, as I’ve said before, I agree that there exist questions without answers, and questions whose answers are necessarily beyond the scope of human knowledge, and I agree that rationality doesn’t provide much value in engaging with those questions… though it’s no worse than any approach I know of, either.
You’re describing a world that provides a level of certainty such that the rationality model works in all cases
As above, I submit that in all cases the approach I describe either works better than (if there are answers, which there often are) or as well (if not) as any other approach I know of. And, as I’ve said before, if you have a better approach to propose, propose it!
I’m asking why you know that amount of certainty exists in the world
I don’t know that. But I have to make decisions anyway, so I make them using the best approach I know. If you think I should do something different, tell me what you think I should do.
OTOH, if all you’re saying is that my approach might be wrong, then I agree with you completely, but so what? My choice is still between using the best approach I know of, or using some other approach, and given that choice I should still use the best approach I know of. And so should you.
for the record, my personal belief is that [..] we cannot have 100% certainty
For the record, that’s also the consensus position here.
The interesting question is, given that we don’t have 100% certainty, what do I do now?
Yes. The vial is either poisoned or it isn’t, and my task is to decide whether to drink it or not. Do you deny that?
Yes, I agree. Indeed, looking for systems to find answers that are better than the one I’m using makes sense, even if they aren’t best, even if I can’t ever know whether they are best or not.
Sure. But “which vial is poisoned?” isn’t one of them. More generally, there are millions of issues we face in our lives for which answers exist, and productive techniques for approaching those questions are worth exploring and adopting.
This is where we disagree.
Which vial contains poison is a fact about the world, and there are a million other contingent facts about the world that go one way or another depending on it. Maybe the air around the vial smells a little different. Maybe it’s a different temperature. Maybe the poisoned vial weighs more, or less. All of those contingent facts means that there are different ways I can approach the vials, and if I approach the vials one way I am more likely to live than if I approach the vials a different way.
And if you have a more survival-conducive way of approaching the vials than I and the other 999 people in the room, we do better to listen to you than to each other, even though your opinion is inconsistent with ours.
Again, this is where we disagree. The relevance of “Truth” (as you’re referring to it… I would say “reality”) is also the extent to which some ways of approaching the world (for example, sniffing the two vials, or weighing them, or a thousand other tests) reliably have better results than just measuring the extent to which other humans agree with an assertion.
Sure, that’s true.
But it’s far more useful to better entangle our decisions (our “subjective truths,” as you put it) with reality (“Truth”) before we make those decisions.
With respect to your example, I can only play with those facts that you have given me. In your example, I assumed that knowledge of which vial has poison could not be known, and the best information we had was our collective beliefs (which are based on certain factors you listed). I agree with the task at hand as you put it, but the devil is of course in the details.
But as noted above, if we cannot derive the truth, it is just as good as not existing. If the “vial picker” knows the truth beforehand, or is able to derive it, so be it, but immediately before he picks the vial, the Truth, as the vial picker knows it, is of limited value—he is unsure and everyone around him thinks hes an idiot. After the fact, everyone’s opinion will change accordingly with the results. By creating your own example, you’re presupposing (i) an answer exists to your question AND (ii) that we can derive it -- we don’t have that luxury in the real life, and even if we have that knowledge to know an “answer” exists, we don’t know whether the vial picker can accurately pick the appropriate vial based on the information available.
The idea of subjective truth (or subjective reality) doesn’t rely solely on the fact that reality doesn’t exist, most generally it is based on the idea that there may be cases a human cannot derive what is real even where there is some answer. If we cannot derive that reality, the existence of that reality must also be questioned. We of course don’t have to worry about these subtleties if the examples we use assume an answer to the issue exists.
The meaning of this is that rationality in my mind is helpful only to the extent (i) an answer exists and (ii) it can be derived. If the answer to (i) and (ii) are yes, rationality sounds great. If the answer to (i) is no, or the answer to (i) is yes but (ii) is no, rationality (or any other system) has no purpose other than to give us a false belief that we’re going about things in the best way. In such a world, there will be great uncertainty as to the appropriate human course of action.
This is why I’m asking why you are confident the answer to (i) is yes for all issues. You’re describing a world that provides a level of certainty such that the rationality model works in all cases—I’m asking why you know that amount of certainty exists in the world—its convenience is precisely what makes its universal application suspect. As noted in my answer to MugaSofer, perhaps your position is based on assumption/faith without substantiation, which I’m comfortable with as a plausible answer, but not sure that is the basis you are using for the conclusion (for the record, my personal belief is that any sort of theory or basis for going about our lives requires some type of faith/assumptions because we cannot have 100% certainty)
Or at least approximated. Yes.
Lovely.
I would say, rather, that it has no purpose at all in the context of that question. Having a false belief is not a useful purpose.
And, as I’ve said before, I agree that there exist questions without answers, and questions whose answers are necessarily beyond the scope of human knowledge, and I agree that rationality doesn’t provide much value in engaging with those questions… though it’s no worse than any approach I know of, either.
As above, I submit that in all cases the approach I describe either works better than (if there are answers, which there often are) or as well (if not) as any other approach I know of.
And, as I’ve said before, if you have a better approach to propose, propose it!
I don’t know that. But I have to make decisions anyway, so I make them using the best approach I know.
If you think I should do something different, tell me what you think I should do.
OTOH, if all you’re saying is that my approach might be wrong, then I agree with you completely, but so what? My choice is still between using the best approach I know of, or using some other approach, and given that choice I should still use the best approach I know of. And so should you.
For the record, that’s also the consensus position here.
The interesting question is, given that we don’t have 100% certainty, what do I do now?