Heh. I taught my phone "Kimhi" but it ignored me this time. — Srap Tasmaner
(A) "Dogs are nice"
and on the other
(B) "For all x, if x is a dog, then it is nice."
We just need a neutral word for the relation between (A) and (B), and, if you start with (A) and recast it as (B), we need a neutral word to describe what you're doing there. Maybe you believe you are "revealing (A)'s logical form," and maybe you don't. — Srap Tasmaner
Again, for me it begins with the puzzle of the Meno. I want to say that if logic is artifice then knowledge is artificial. And of course some of what we involve ourselves in when we do logic is artifice, but that doesn't mean that there is nothing more than that involved. — Leontiskos
One of the problems here is that focusing on Frege may give the false impression that his account remains paradigmatic for modern logic. It isn't.From what I understand, in the Begriffsschrift "⊢" is an explicit judgement; what follows is known, while — would prefix "a mere complex of ideas", un-affirmed (SEP). In the Grundgesetze this has changes significantly; ⊢ now says something like "The following names the true" (SEP). That's much closer to it's modern use, where ⊢ρ is "ρ is a theorem" and ψ⊢ρ says "ρ is derivable from ψ". Notice that in these more recent uses, truth is not mentioned. That's important. — Banno
So far as my previous posts on this page, I was making the point that we can talk about our utterances with greater lucidity that about our thoughts, simply because our utterances are public. — Banno
One of the problems here is that focusing on Frege may give the false impression that his account remains paradigmatic for modern logic. It isn't. — Banno
But earlier Leontiskos offered an example that would have come out as(A) "Dogs are nice"
and on the other
(B) "For all x, if x is a dog, then it is nice." — Srap Tasmaner
What this shows is how logic can be used to clarify the somewhat ambiguous English of "Dogs are nice" by making explicit the difference between a universal and existential quantification. Of course, we could have done the same thing in English by asking "Do you mean that all dogs are nice or that some dogs are nice?".(C) There are things that are both dogs and nice
I suspect that the difference of opinion between Leontiskos and I is that he thinks of logic as an account of how we either do, or perhaps how we ought, to think. — Banno
If someone thinks that P, the assertoric force associated with thinking that P is conceived of as part of thinking that P - and the force is not truth functional — fdrake
It is because the primary language was acquired in that "critical period" that we both can understand meaning of words conveyed. From there, you can ask "whence meaning from language", and one can play around with concepts like "language acquisition modules" and "language meaning comes from use", but that is contesting the "how", not the very fact that communication, is often, by and large, pretty successful and typical. Yes, language can breakdown, but it more often than not, it doesn't.
If you read the SEP article on states of affairs, it talks about how they have the form of thoughts. In other words, we don't think of the world as disconnected objects, we think of it as states, which implies the verb "to be.". The way I've been putting it is that we imagine the world can talk.
Remember in the Tractatus, Witt says the world is all that is the case. He's expressing this same idea, but he's going to move toward saying logic is not in our field of view when we look at the world. So if one got the notion that since (phenomenologically) the world talks to us in complete thoughts, that logic is the structure of the world (this is basically Stoicism), then Witt says your language here has gone on holiday. You're spouting nonsense. Logic is not informative about anything.
That's one way to think of it anyway. — frank
Maybe, but Frege denied that correspondence is a definition of truth. — frank
Just speak plainly.. In a couple sentences, what is Frege's idea of Truth? — schopenhauer1
that those propositions accurately portray states of affairs of the world) — schopenhauer1
He thought that truth can't be defined. Definition implies breaking something down into smaller pieces (a zebra is a horse with stripes, for instance.). Truth can't be broken down any further. It can't be taught. You just know what it is. — frank
and see what the book helps us to understand about the perennial problem of mind's special place in the world, or what Kimhi calls "the uniqueness of thinking." — J
No word means anything until it's used, as opposed to mentioned. — frank
In this case "know" means to understand what's being asserted by the use of the word. No word means anything until it's used, as opposed to mentioned. — frank
Truth can't be broken down any further. It can't be taught. You just know [understand what's being asserted by the use of the word] it is. — frank
Truth" for Frege becomes simply about the ability to parse meaning of statements (The grass is green), rather than corresponding to the world, (It is true that grass is green). — schopenhauer1
Troll summary in a nutshell: Is the like like the like that likens the unlike with the like in the like and the unlike alike? — fdrake
Concretising the schematism into expression rather than making it transcendentally prior? — fdrake
I think so. — frank
Glancing at SEP, what I see is "States of affairs are similar to thoughts. Thoughts are true or false; states of affairs obtain or not." That's a little different. So yes, similar, but by bringing in a verb like "obtain" we are trying to move away from talk about language (such as truth values), and into the world independent of thought — J
Witt says that all such worries about how thought is related to cosmology amount to nonsense. If you're worried about metaphysics, you're trying to do something with language that it's not capable of. But the attraction of going back down the ladder and getting all worked up over metaphysics is always there. Who can resist? — frank
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