Still not sure what point you’re making though. — Srap Tasmaner
Perhaps the assertion "I know that p" is implicitly the assertion "I know that p and I am certain" and so the assertion "I know that p but I am not certain" is implicitly the contradictory assertion "I know that p and I am certain but I am not certain"? — Michael
No, the hypothetical shows the logical consequences which follow from the condition that it is actually raining in the real world. People make assumptions. But whether it is raining or not is a condition that is independent of people's assumptions. — Andrew M
I for one would appreciate it if you stopped saying things like this. Andrew and Michael are clearly not trying to deceive you. If they are mistaken, then they are mistaken, but there’s no deception here. — Srap Tasmaner
(2) If, for the sake of a hypothetical bit of reasoning, and with some concern about the weather but no access at the moment to a weather report, suggest that if it is raining, we won’t be able to go for a walk, I hold no belief either way about whether it is raining; I only mean to suggest how we should act if it turns out (that is, if at a later time we actually know) that it’s raining. Quite different from (1), in which the “assumption” is what I honestly believe. That’s simply not the case here. NB: these are the sort of assumptions that must be discharged; it’s just the terminology of natural deduction. — Srap Tasmaner
You may of course do as you like, but the rest of us have not invented some special usage for “know” or for “true”; I’m using them exactly the way everyone I know uses them, this being the population that is also perfectly comfortable saying “I could have sworn I knew where I left it, but it’s not there, so I guess I was wrong.” — Srap Tasmaner
Here, I’ll give you a good one. When I was a kid, I was taught, and I learned, that there are nine planets. That is no longer true, but it was true at the time, because there is a specific body of astronomers who make the “official” determination of whether a solar object is a planet. In such a case, I might be able to say I used to know that there were 9 planets, but now I know that there are 8. Note that I have made no mistake and have no reason to retract my knowledge claim. But suppose it was a couple weeks before I heard that Pluto had been demoted; during that time I might get into a heated argument with someone I think a fool because he says there are only 8 planets. At this point I will be wrong; I will be in the position of thinking that I know how many planets there are, and I will be wrong about that. Once he points out to me that there was a change in Pluto’s status, I will readily admit that I thought I knew, but that he was right. — Srap Tasmaner
Why? I don't need to be certain that something is true to assert that it is true. I will have Weetabix for breakfast tomorrow. I'm not certain that I will, but I'm still going to say that I will. — Michael
No. I'm happy with fallibilist knowledge. It's consistent with ordinary use. The list of things we claim to know is greater than the list of things we claim to be certain about, and so clearly what we mean by "know" isn't what we mean by "certain". — Michael
You start by saying that it has to actually be raining for Alice to know that it is raining. You then conclude by saying that we have to be certain that it is raining for Alice to know that it is raining. — Michael
You then conclude by saying that we have to be certain that it is raining for Alice to know that it is raining. — Michael
So as I said in my previous post, you are asserting that if we are not certain that it is raining then it is not actually raining. — Michael
Not necessarily. From the fact that it‘s raining, you can’t conclude that it might not be; for all you know, it might necessarily be raining. — Srap Tasmaner
But in all these examples, the important thing about a hypothetical is that you must discharge your assumption. So the conclusion of a hypothetical is always, at least implicitly, a conditional. “Suppose I have a dollar bill and 2 quarters. Then I have $1.50 total,” is to be understood as “If I have a dollar bill and 2 quarters, then I have $1.50.” — Srap Tasmaner
That’s the whole point of hypotheticals, to see what follows from the assumption, to see whether something in particular does, not to make a claim about whether the assumption holds or not, or even whether it’s possible or not. Sometimes in informal reasoning, people miss the step of discharging their assumptions, so they’ll end up claiming something like “But I just proved that I have $1.50!!!“ when all they‘ve proven is that if they had $1.50 then they’d have $1.50. — Srap Tasmaner
To me, certainty sounds like a psychological state, something like “maximal confidence,” and it’s irrelevant. It could turn out I was wrong even if I was certain. Would you like here to do the same thing you don’t like with the word “knowledge” and say that if that were to happen, then it must be that you weren’t really certain, but only thought you were? — Srap Tasmaner
The interesting thing people keep saying is that it might “turn out” that P isn’t or wasn’t the case, that I was right or wrong. No worries when we’re just dealing with belief, because that suggests that there is newly acquired evidence. No one bats an eye at “I thought she was at the store but it turns out she wasn’t.” For all I knew, she was at the store, but now I know more and my knowledge now includes that she wasn’t.
No one seems to bring up, “I thought she was at the store and it turns out I was right.” Here the speaker is still not claiming to have known she was at the store, but to have had the belief, a belief which was true, without his knowing that. — Srap Tasmaner
Because knowledge is factive, so something is entailed about the state of the world by what you know; water either freezes at 32°C or it doesn’t. — Srap Tasmaner
The hypothetical shows the logical consequences that follow when it is actually raining in the real world. — Andrew M
Your argument seems to be that if we cannot be certain that it is raining then it is not actually raining and that if we cannot be certain that it isn't raining then it is not actually not raining. This doesn't follow and is even a contradiction. — Michael
When I point out that a premise of the hypothetical is that it is raining, I'm not claiming that it's actually raining outside, here in the real world. — Andrew M
No, not infallibly. One can possibly be mistaken about what the premises of the hypotheticals are. But since they are clearly stated, there's no good reason why anyone should be mistaken. — Andrew M
As a result of looking out the window, Alice justifiably believes that it is raining outside. For Alice to know that it is raining outside, her justifiable belief also has to be true. Those are the conditions for knowledge. Let's look at two different scenarios:
(1) If it is raining outside, then Alice knows that it is raining outside. She knows that even though she didn't exclude the possibility that it was not raining and that Bob was hosing the window. She knows it is raining because her belief is both justifiable and true. Alice has satisfied the conditions for knowledge.
(2) If it is not raining outside (say, Bob was hosing the window which Alice mistakenly thought was rain), then Alice's belief is false. Thus she doesn't know that it is raining, she only thinks that it is. Alice has not satisfied the conditions for knowledge. — Andrew M
The example shows that human fallibility doesn't preclude Alice from knowing that it is raining. — Andrew M
You and I know up front because I created the hypotheticals that way. The question is not about what you and I know, which is a given, but about what Alice knows. — Andrew M
No. But the hypothetical shows the consequences that follow when it is raining. Namely that Alice knows that it is raining when, in addition to it raining, she has a justified belief that it is raining. — Andrew M
Just take as accepted, anything not counted as physical is not counted as empirical, and anything not counted as empirical in some way is counted as a priori, and anything not counted as empirical in any way whatsoever is counted as pure a priori. It follows that whatever is there that makes changes in one’s subjective condition merely possible, is pure a priori. But it must be something, and thus is established and justified, a precursory condition. — Mww
The sound a lead ball makes is different than the sound a rubber ball makes, and the sound a ball makes is different than the sound a trash compactor makes. That all these make a sound is determined by the the matter of each, but the matter of these, while affecting the senses with sound, do not carry the information of what form the matter has. It is impossible for us to get “ball” out of the sound an object makes when it hits something solid. Without antecedent experience, you cannot get “telephone” out of some arbitrary ringing/clanking/buzzing sound. — Mww
Justified cannot mean proven. When it comes to empirical beliefs, nothing we consider ourselves justified in believing can be proven. The provenance of proof is in logic and mathematics, not in inductive reasoning. — Janus
I haven't disputed that, but it does not follow that all kinds of know-how are forms of knowing-that, which is why I have been trying to point out to you that there are kinds of know-how that have nothing to do with justification, truth or even belief. — Janus
You and I know up front because I created the hypotheticals that way. — Andrew M
I don't think you can claim to follow the traditional formulation, because your understanding of what constitutes justification and truth is not in accord with the usual understanding. The usual understanding does not demand "proof" to underpin justification, and does not consider truth to be dependent on human intentions, honest or dishonest. — Janus
JTB is a definition of propositional knowledge, not know-how. — Janus
Even if propositional knowledge could be, at a stretch, considered to be a kind of know-how; there are many other kinds of know-how which have nothing to do with truth or justification. — Janus
The independent property is having three edges and vertices. — Michael
They have a nature, including a mass, an extended position (i.e. a shape), and often a certain kind of movement. — Michael
That we decide which words refer to which properties isn't that the object only has these properties if we refer to it using these words. This is the fundamental mistake you keep making. If something has three edges and vertices then it is a triangle even if we do not call it a triangle. — Michael
If I ask someone to tell me the truth of where my kidnapped wife has been hidden I'm not interested in where the person believes my wife has been hidden; I'm interested in where she's actually been hidden. — Michael
The request to "tell the truth" is premised on the notion that things actually are as this person believes them to be. — Michael
They are hypothetical scenarios, and you know up front whether or not it is raining in each scenario. In the first scenario, it is raining (that's a given premise of the hypothetical). In the second scenario, it is not raining. — Andrew M
No, as demonstrated by the first scenario, Alice knows that it is raining not because she is infallible (or because she had ruled out all other possibilities such as Bob hosing the window), but because she had a justified, true belief. — Andrew M
The issue here is not all of metaphysics but a simple conditional: if they can be counted -- if -- then there must be a specific number of coins in the jar right now. — Srap Tasmaner
But it is easily fooled because all it does is count, and counting doesn't require -- so the machine doesn't offer -- judgment. — Srap Tasmaner
My question was concerning how to distinguish between belief and knowledge. Beliefs can be understood to be "principles used for willed actions". So "being intentional" cannot be a sufficient criterion for saying that someone has knowledge as opposed to merely having belief. — Janus
Bear in mind I am not concerned with "know-how" but with 'knowing-that' (knowing how to do anything does not seem to have anything to do with justified true belief). So, do you have a way to distinguish between knowledge and belief, or do you reject the distinction? — Janus
No one determines whether or not it is raining. — Banno
Then, how do, or could, we know that something is knowledge, according to you? (A concise, short-winded answer will do just fine). — Janus
If you mean that my argument is only valid in a world very much like ours, I agree. — Srap Tasmaner
To return to the issue at hand: I consider my arguments valid in worlds very much like this one. In worlds like this, if the number of coins in a jar can be determined by counting them, then you can know, without counting, that there is a specific number of coins in the jar. — Srap Tasmaner
Do you agree? — Srap Tasmaner
No. A number is a value. It is the "propositional content" of one or more mathematical symbols. For example, 0.250.25, 1414, and 2828 are different mathematical symbols that refer to the same mathematical value. — Michael
Being called a triangle and being a triangle are two different things. — Michael
This is where we disagree. Objects exist and have properties even if we are not aware of them. — Michael
In the first scenario it is raining, in the second scenario it is not. According to knowledge as justified, true belief, do you judge that Alice has knowledge in either or both of those scenarios? — Andrew M
That question I answered as clearly as I could, and even provided informal proofs to support my position.
If you have no rebuttal besides "maybe coins spontaneously appear and disappear," then we're done here. — Srap Tasmaner
In the sense that the numeral refers to a number and that number is the number of coins prior to being counted. — Michael
t's not magic. We agree to use the word "triangle" to refer to the shape of some object that we have seen. Now, every object with that shape -- even objects we haven't seen -- are triangles, even though we haven't explicitly used the word "triangle" to refer to each of those objects individually. They are triangles by virtue of having the same shape as an object that we have referred to as having a shape named "triangle". — Michael
We've already agreed that the numeral "66" refers to a specific number.. — Michael
You make the mistake of saying that because we need to explicitly assign a particular word or numeral to a particular kind that we need to explicitly assign that particular word or numeral to every individual of that kind. This is false. We need to do the former to establish meaning, but we don't need to do the latter. — Michael
The T-schema is useful here. There are 66 coins iff "there are 66 coins" is true, there are 67 coins iff "there are 67 coins" is true, there cannot be both 66 and 67 coins, therefore "there are 66 coins" and "there are 67 coins" cannot both be true. — Michael
This is consistent with how we actually understand the meaning of the word "true". I don't know why you're trying to make it mean "honest belief". What evidence or reasoning is there for that? — Michael
On the other, you would be claiming that "there are 64 coins in the jar" is neither true nor false. That is, you are rejecting bivalence, the view that all statements are either true or they are false. — Banno
(1) If it is raining outside, then Alice knows that it is raining outside. She knows that even though she didn't exclude the possibility that it was not raining and that Bob was hosing the window. She knows it is raining because her belief is both justifiable and true. Alice has satisfied the conditions for knowledge. — Andrew M
Your reasoning appears to be that there are 66 coins in the jar because we have counted 66 coins, whereas my reasoning is that we have counted 66 coins because there are 66 coins in the jar. — Michael
The problem with your reasoning is that it doesn't explain why it is that we counted 66 coins (and not, say, 666), and also that it can lead to the contradiction which I reject in (b). — Michael
What do you mean by a number being assigned? — Michael
No, we needn't take that as a premise. We can argue for it. — Srap Tasmaner
If we remove a coin from the jar, then there is some time t1, after t0 and after we have removed one coin but before we have removed another. If the jar is empty at t1, then the initial state of the jar at t0 was that it contained 1 coin, and 1 is a natural number. If the jar is not empty at t1, we go again. If we remove another coin, then there is a time t2, after t1 and after we have removed another coin but before removing any others (if there are any). If the jar is empty at t2, then it contained 1 coin at t1, and 2 coins at t0, and 2 is a natural number. If the jar is not empty at t2, we go again. — Srap Tasmaner
Let's return to the beginning of this exchange: — Andrew M
That we "exclude the possibility of mistake" is not a condition of knowledge, as ordinarily defined and used. — Andrew M
That we "exclude the possibility of mistake" is not a condition of knowledge, as ordinarily defined and used.
For example, Alice claims it's raining outside as a result of looking out the window. We can conceive of ways that her claim can be false (say, Bob is hosing the window), and thus not knowledge. But if it is raining outside, then she has knowledge. — Andrew M
The temporal continuity of what? I don't understand the point you're making here. — Srap Tasmaner
The procedure I described, if it terminates at all, yields a unique value. It cannot do otherwise unless the procedure is undermined by other premises. Did you have such a premise in mind? — Srap Tasmaner
Suppose a jar contains some coins, but for no natural number n is it the case that the jar contains n coins. Then for no natural number n is it the case that removing exactly n coins from the jar would leave the jar empty. If the number of coins in the jar could be determined by counting to be some natural number k, then removing exactly k coins from the jar would leave the jar empty; therefore the number of coins in the jar cannot be determined by counting to be any natural number k. — Srap Tasmaner
What, in your wisdom, is math after all? — Real Gone Cat
The flat-earther is not claiming it is. He will point to what he regards as evidence for a flat earth. Is his claim thereby justified? — Andrew M
Let me put it differently: Cartesian certainty is not a condition of knowledge, as ordinarily defined and used. — Andrew M
The issue is not about what language one uses to refer to a kettle. It's that someone can conceivably, and honestly, mistake something for being a kettle that is not, or for not being a kettle when it is. — Andrew M
That's exactly the point. Someone might be mistaken about whether the object before them is a kettle. Similarly someone might be mistaken about whether they have knowledge. People can make honest mistakes. They thought it was a kettle when it wasn't. They thought they knew something when they didn't. — Andrew M
But as I said, the findings of science are that the position of an electron isn't like the number of coins in the jar. The former is in a superposition, the latter is not. If you want to use science to support your position then you cannot pick and choose which bits you like. — Michael
I'm not even sure what you're asking. If you're asking if somebody has determined the number of coins before somebody has determined the number of coins, then of course not. If you're asking if there is some number of coins before somebody has determined the number of coins, then yes. — Michael
Your argument seems to commit a fallacy of equivocation. — Michael
If the procedure terminates, then the number we have reached is the number of coins that were in the jar before we started counting. — Srap Tasmaner
But if we do agree what to count as a coin and which coins to count, we know there is a procedure available, and that we will be able to determine the number of coins currently in the jar, even if we have not yet made that determination. — Srap Tasmaner
somehow the truths of math have been revealed to no one else but you. — Real Gone Cat
The flat earther will say he is justified in making his claim, you say he is not justified. It's your word against his. — Andrew M
Infallibility isn't a condition of knowledge, as ordinarily defined and used. — Andrew M
If it is later decided that your "knowledge" was wrong, then that just is to decide that you didn't have knowledge, as ordinarily understood. — Andrew M
By that argument, there is also no such thing as something we can truly call a "kettle" because we can never exclude the possibility of mistake. — Andrew M
So are you saying that the number of coins in the jar is in some sort of superposition of all possible numbers until someone counts them? — Michael
Forget the word "true" for the moment: what kind of (meta)physics are you suggesting describes the nature of the world? — Michael
I am asserting what our best understanding of the world entails. You brought up quantum mechanics earlier to support your argument, so you appear to accept the findings of scientific enquiry, and the findings of scientific enquiry are that the number of coins in the jar isn't in a superposition of all possible numbers until counted.
I would say that you are begging the question, saying that "there is no such thing as the number of coins in the jar [until counted]" without any evidence or reasoning. — Michael
Time, however, is a concept and it can be defined as what clocks measure, but time is not limited to this definition. — val p miranda
As a concept, time is the measurement of motion. — val p miranda
There is some number n where n >= 0 such that “there are n coins in the jar” is true even if nobody has counted them. — Michael
And how do you account for two people making contradictory judgements, much like you and I here? Is it just the case that we disagree or is it also the case that one of us is right and one of us is wrong? — Michael
I've told you about a million times already, you can have axioms for whatever you want*, even inconsistency if that's your thing. — TonesInDeepFreeze
I can say "there are 66 coins in the jar" and that claim can be true even if I haven't counted the coins in the jar and even if nobody knows how many coins are in the jar. — Michael
It's not the case that my claim retroactively becomes either true or false after someone has counted them. And it's not the case that if two people count the coins in the jar and come to a different conclusion that both of them are right. — Michael
We're not talking about quantum states though. — Michael
Good luck with that. — jgill
A proposition being true and a proposition being determined to be true are two different things. — Michael
There is a correct answer to "how many coins are in the jar?" before we actually count them. — Michael
It's not just a judgement. See above. — Michael
A flat-earther can claim to know that the world is flat. He nonetheless doesn't know that. — Andrew M
Actually, it does. For example, people once said that they knew that Hilary Clinton was going to win the 2016 election. But since she didn't win, they didn't know that at all, they only thought they did. The term knew is retracted because of the implied truth condition. — Andrew M
I see that Oxford Languages lists that as an archaic usage, as in "we appeal to all good men and true to rally to us". — Andrew M
As I said to another poster a few days ago, all this says is that we determine the meaning of a proposition. It doesn't follow from this that we determine the truth of a proposition. — Michael
Our language use determines the meaning of the proposition "water is H2O". John believes that this proposition is true and Jane believes that this proposition is false. The laws of excluded middle and non-contradiction entail that one of them is right and one of them is wrong, irrespective of what they or I or anyone else judges to be the case. — Michael
There is no judgement. It just either is or isn't true. — Michael
pi is not a ratio of two rational numbers.
pi is the ratio of the circumference of any circle and its diameter. But if the diameter is rational then the circumference is not. So still pi is not the ratio of two rational numbers.
So there is not a contradiction. — TonesInDeepFreeze
Since music is numinous in nature, it being somewhat of a bridge between us and the universe, the Pythagoreans probably extrapolated the math found therein to the universe itself. — Agent Smith
The discovery of irrationals, kind courtesy of Hippasus of Metapontum who was thrown overboard to prevent word of this getting out, threatened to overturn what was up to that point a perfect world. A simple and yet magnificent way mathematics could serve as the foundation of the universe had to be abandoned. I wonder what Max Tegmark has to say about this? — Agent Smith
I know, I know, pay no attention to the man behind the curtain. — jgill
Mathematicians come up with general formulas, involving pi and other irrational numbers. Isn't it the case that engineers make use of those general formulas, from which they can decide what specific specific values to use as close enough for the task at hand? — TonesInDeepFreeze
You clearly refer to negative knowledge of p (i.e. ~Kp); not to positive knowledge of not-p (i.e. K~p). You say that it is not knowledge: "not allowed to be called knowledge", "said not to be knowledge". It is unreasonable to deny this; it is there in black and white. — Luke
It cannot be known that not-p is true if p is true, due to non-contradiction. This applies at any given time. — Luke
The same person or people making the judgment that p is true in your example. It makes no difference.
Obviously it's not the person who knows not-p.
— Metaphysician Undercover
Obviously not. Nobody can know that not-p is true if p is true. — Luke
Is it a coincidence that the word "irrational" means illogical/makes zero sense? — Agent Smith
That a verb like "know" isn't factive.
One of my aims here has been to convince you to abandon the idea that the 'factive verbs' form a sui generis semantic or syntactic category. Perhaps there is some sui generis semantic or syntactic category of expressions that deserves the name 'factive verbs' or 'factive expressions', but the list that philosophers usually offer does not comprise such a category. I have made a case for denying that an utterance of "S knows p' is true only if p is true, i.e. that "knows" is factive. — Michael
I would rather take the inference rule as primary and say that our usage of "know" mostly, though imperfectly, follows that -- that this is the nature of knowledge -- rather than saying the inference rule rests on an analysis of how we use the word "knows." — Srap Tasmaner
That was one of my two options: At one time the person claimed to know p, but it turns out later that they did not know p. — Luke
And how did they "decide" this? — Luke
My understanding on the factivity of "know" is that you cannot know ~p where p is true. — Luke
Grice claims that conversational implicature is "triggered" by an apparent violation of a maxim of conversation, which suggests that what you mean by uttering p must be different from the plain meaning of p, in order to preserve the assumption that you are cooperative (and not after all violating a maxim). — Srap Tasmaner
