However God actually exists, people seem to think of him as being whatever they themselves are able to understand to be the best and most important. So, God as a concept is typically a projection of one's own values. So, a secular interpretation of Jesus' command to love God with all one's heart, is that one ought to put first things first, and thus feel, think, and do whatever one is able to understand to be best. "Fear of the Lord" may be understood to mean that there exists an external reality which is bigger than not only one's own personal desires, but also bigger than the local social consensus, and one might be very badly hurt for ignoring it. Although for the religiously-minded, they do not distinguish between abstract ethics and a personal God, so that the moral meaning of passages such as these do not need interpretation. — Brendan Golledge
None. I thought that was the result of his numbering system for mathematical proofs. The Godel numbers, lead to a conclusion that you can't in fact provide support for every mathematical assertion. Without reaching some paradox. I don't remember the details.What specific remarks by Godel are you referring to? — TonesInDeepFreeze
Fair point. Trying to see if I could argue it. Boolean logic is pretty solid.No. A tautology is a formula that is satisfied by every interpretation. No contradiction is satisfied by any interpretation. Therefore, no tautology is a contradiction. — TonesInDeepFreeze
Cheshire is saying that this view, that may cement logical monism, especially in the sense of using logical principles as laws, is an internalist conceit. Cheshire points to the way classical logic is self-contained and self-protecting. It's a castle built on air, and potentially leaving us deluded.
Cheshire would prefer to see us start from where we are, here in the world, with our problems in view instead of down in a brain-vat. — frank
Might you be conflating foundationalism with monism here? Hegel has a circular and fallibalist epistemology, but it is monist. Artistotle thinks that "what is best know to us," our starting point, are concrete particulars, the "many." But what are "best known in themselves," are unifying, generating principles (the unifying "one(s), which virtually contain the many. Nor is Aristotle particularly rigid; he admonishes us not to expect explanations that are more detailed than the topic area under discussion allows in the ethics (pace analytics who have tried to quantify "moral goodness"). Both have a monistic theory of logic/Logos, but neither are foundationalists. — Count Timothy von Icarus
EDIT: So, what's that got to do with monism? The LNC isn't usually claimed to be a substance, even if it is foundational in some sense. — bert1
I think for Hegel a thing contains its opposition. So for redness, non-redness is part of what it is. Everything you think about is like that. You think in oppositions. But dialetheism would be a mystical state of mind? — frank
And ↪Cheshire's "a thing can't really be otherwise or not," would be a similar sort of reasoning. Dialetheism is normally argued for in the context of paradoxes related to self-reference (as has been the case in this thread). I think critics would argue that these are no more mysterious than our ability to say things that aren't true (which perhaps IS mysterious). At any rate, the "actual" true contradictions that get thrown out, in the SEP article for example, etc. tend to be far less convincing. For example, "you are either in a room or out, but when you are moving out of a room, at one point you will be in, out, both, or neither." — Count Timothy von Icarus
Could you explain that again? Sorry if I'm a little dense.
You're saying that a monistic system has no constraints on truth? — frank
Honestly, I don't think I can. If it looks like the LNC isn't holding for me, I'd wonder if I just had a stroke. :razz: — frank
A really good one? A good what? — frank
I think we call the LNC necessary because we can't conceive an exception. It's not like we thought: "let's ordain this thing!". Right? — frank
So the sense of "complete generality" also allows Russell to consider variations over interpretations and the relationship of interpretations with syntactical elements of languages - it's thus a highly metalinguistic notion. Which is not surprising, as the Logic Of All And Only Universal Principles would need to have its laws apply in complete generality, and thus talk about every other logical apparatus in existence. — fdrake
There are two questions with this pluralism/monism debate: What the heck is the thesis supposed to be, and Who has the burden of proof in addressing it? The answers seem to be, respectively, "Who knows?" and "The other guy!" :lol: — Leontiskos
Well, even "necessary" has differing interpretations depending on which logical system one chooses - S1 through S5 for a start. And we have logical systems that are incomplete. I'm not sure what to say. — Banno
1) To be a law of logic, a principle must hold in complete generality. — Banno
I agree with underlined point completely. The scientific and metaphysical arguments for monism tend to be abductive arguments based on this idea. This is why deflation is problematic as a background assumption. It needs to be an explicit premise, else we end up talking past each other, since the disagreement is really about what is properly "truth-preserving" in the most perfect* sense, not about what is true of formal systems and the logical consequence relationships each uses. — Count Timothy von Icarus
Anyhow, I think you get at a good point, in that I can imagine that many who subscribe to "classical metaphysics" (i.e. the serious "neo-neoplatonists" today, or Thomists) might actually agree with the nihilist that laws, as in short, stipulated formulae, are incapable of capturing the logical consequence relationship because they cannot capture analogical predication of truth and being properly. But I think they would disagree in concluding that the logical consequence relationship can be either arbitrary or unintelligible as a unity. Just for an example, I don't think Eriugena's four-fold distinction of being where "to say 'angels exist' is to negate 'man exists'" (when using exists univocally) is going to fit nicely into formal context. You could add four distinct existential quantifiers related by some sort of formalism of analogy, but I don't think that's going to cut it. — Count Timothy von Icarus
This seems like a useful clarification of terms. Where I have seen the term used, and how it is used in the papers we have been discussing, the idea is that there is no logical consequence relationship. It is not that there is no general consequence relationship that obtains in all cases. The idea that there are truth-preserving rules of logical consequence but that they might vary is called logical pluralism. — Count Timothy von Icarus
Nihilism seems more to me like we all have wood blocks and jigsaws and we can cut out whatever we please. Which, as an analogy for "how does one derive conclusions from true premises," seems like a poor one if one has any notion that truth is not some sort of post-modern "creative act." — Count Timothy von Icarus
This is why deflationism is question begging. You can set up the argument like so:
1. Truth is defined relative to different formalisms.
2. Different formalisms each delete some supposed "laws of logic," such that there are no laws that hold across all formalisms.
3. The aforementioned formalisms each have their own definition of truth and their systems preserve their version of truth.
C: There are no laws vis-á-vis inference from true premises to true conclusions. — Count Timothy von Icarus
Well, logical nihilism is not the position that true and false are always relative, it's the position that nothing follows from anything else. It is certainly easier to argue for it if truth is relative, but it's the claim that truth cannot be inferred. You could presumably claim that there are absolute truths, just not that there is anyway to go from one truth to another. — Count Timothy von Icarus
It's faith. — frank
That wasn't reframing. We were talking about why a monist might insist on a logic for all cases when it's not clear what that logic would be. — frank
If we accept this, not as a useful tool, but as a claim about truth tout court, what exactly makes STT a better theory of truth than any other? Can it be truly better? True relative to what, itself? — Count Timothy von Icarus
The story at least since Russell's paradox and Gödel seems to indicate that this is not what happens. — Banno
The problem for logical monism is that if there is only one logic, then which one? — Banno
I think we don't know that it can't. Things are certainly going to remain contradictory in many cases.Okay, so you think the PNC can be violated without being destroyed? — Leontiskos
Again, I would suggest focusing on the argument I gave, not some argument you are afraid I will give at some point in the future. — Leontiskos
Implied by stating it's violation is a destruction.Where do you find that claim, "They aren't logical without total adherence?" — Leontiskos
Can you answer the question? Do you agree with the argument? If you disagree then please explain which premise you oppose. — Leontiskos
I don't see it. It doesn't say "pluralism implies a contradiction, thus not-pluralism" but rather "if pluralism then not-PNC.*" How does this give priority to PNC? One might affirm pluralism here and just deny PNC. — Count Timothy von Icarus
So we end up with this:
The "true/correct logics" either contradict one another or they don't.
If they do, then the PNC has been destroyed.
If they don't, then we are no longer talking about logical pluralism. — Leontiskos
Pick your poison. Your thesis is that there are true/correct logics with nothing in common, such that we cannot call their similarity logic in a singular sense, and we cannot apply a rational aspect under which they are the same. — Leontiskos
I just go around assuming I'm wrong a lot. It's gotten less efficient with age and education but I'm always the one pleasantly surprised at the end. So, we have systems that allow for the occasional violation of the PNC or has a suitable alternative been found?I could go along with your suggestion as a way-point, but not as a conclusion. If the argument is sound and the premises true, then if the conclusion is false something is amiss and must eventually be addressed. — Banno
That'd be logical nihilism. What is being suggested is logical pluralism.
You might try
1. If we have discursive knowledge, then there are true/correct logics
L1. We have discursive knowledge.
L2. Therefore, there are true/correct logics. — Banno