It misleads Michael to think that truths only exist when sentences exist. — Banno
Do they exist if language doesn't? This is the core of the issue. If sentences are features of language then even if sentences are abstract my point still stands: if there is no language then nothing has the property of being true or false, much like if there is no language then nothing has the property of being semantically meaningful. — Michael
There's no need to resort to Platonism. — Michael
I understand what you're saying. You're saying truth is a concept that couldn't have been meaningful 50 million years ago because there was no one to recognize any kind of concept. From our point of view, there were rocks and clouds, but those concepts didn't exist then, which means there was no one to observe that they existed. — frank
I'm saying that a truth is something like a correct description, and that descriptions (whether correct or incorrect) didn't exist 50 million years ago. — Michael
Do you have to have those descriptions in hand in order for there to be truth? Where no description is available (say about something across the galaxy), would you say there is no truth? — frank
You are asking this question:
Do you have to have those descriptions in hand in order for there to be true descriptions? Where no description is available (say about something across the galaxy), would you say there is no true description?
I don't even understand how to answer such a question. It's inherently confused. — Michael
There is some state of affairs even when there is no one to describe it, right? — frank
Here's a post of mine from six days ago:
And the existence of gold does not depend on us saying "gold exists".
— Michael — Michael
I don't really know what the practical implications of your view are. — frank
The traditional view is that there are truth-makers and truth-bearers. Truth and falsehood are properties of truth-bearers, not properties of truth-makers, and not the truth-makers themselves.
If the appropriate truth-maker exists/occurs then the truth-bearer is true, otherwise the truth-bearer is false.
A truth-maker can exist even if a truth-bearer doesn't, but if a truth-bearer doesn't exist then nothing exists that has the property of being either true (correct/accurate) or false (incorrect/inaccurate). — Michael
I was simply explaining the ordinary grammar of the word "true". — Michael
You talked before about truth being a relation between a sentence and something else in the world. — Michael
Yep. The gold and the hills and such....you are not using the word "truth" to refer to the property that truth-bearers have, but something else. — Michael
All three of the following have the very same truth value:
"There is gold in those hills" has the property of "truth"
"There is gold in those hills" is true
There is gold in those hills — Banno
Ok. But were there things that were true? Was there gold in those hills?I'm saying that a truth is something like a correct description, that a falsehood is something like "an incorrect description", that descriptions didn't exist 50 million years ago, and so that neither truths nor falsehoods existed 50 million years ago. — Michael
I cannot bring a world quite round,
Although I patch it as I can.
Michael was poking around in this when he earlier said that realism inevitably courts skepticism. — Leontiskos
One proposal is to construe metaphysical realism as the position that there are no a priori epistemically derived constraints on reality (Gaifman, 1993). By stating the thesis negatively, the realist sidesteps the thorny problems concerning correspondence or a “ready made” world, and shifts the burden of proof on the challenger to refute the thesis. One virtue of this construal is that it defines metaphysical realism at a sufficient level of generality to apply to all philosophers who currently espouse metaphysical realism. For Putnam’s metaphysical realist will also agree that truth and reality cannot be subject to “epistemically derived constraints.” This general characterization of metaphysical realism is enough to provide a target for the Brains in a Vat argument. For there is a good argument to the effect that if metaphysical realism is true, then global skepticism is also true, that is, it is possible that all of our referential beliefs about the world are false. As Thomas Nagel puts it, “realism makes skepticism intelligible,” (1986, 73) because once we open the gap between truth and epistemology, we must countenance the possibility that all of our beliefs, no matter how well justified, nevertheless fail to accurately depict the world as it really is. [See Fallibilism.] Donald Davidson also emphasizes this aspect of metaphysical realism: “metaphysical realism is skepticism in one of its traditional garbs. It asks: why couldn’t all my beliefs hang together and yet be comprehensively false about the actual world?” (1986, 309)
The Brain in a Vat scenario is just an illustration of this kind of global skepticism: it depicts a situation where all our beliefs about the world would presumably be false, even though they are well justified. Thus if one can prove that we cannot be brains in a vat, by modus tollens one can prove that metaphysical realism is false. Or, to put it in more schematic form:
If metaphysical realism is true, then global skepticism is possible
If global skepticism is possible, then we can be brains in a vat
But we cannot be brains in a vat
Thus, metaphysical realism is false (1,2,3)
The problem is that his idiosyncratically defined "anti-realism" doesn't seem to offer a substantive alternative. — Leontiskos
For Dummett, realism is best understood as semantic realism, i.e. the view that every declarative sentence in one's language is bivalent (determinately true or false) and evidence-transcendent (independent of our means of coming to know which), while anti-realism rejects this view in favour of a concept of knowable (or assertible) truth. Historically, these debates had been understood as disagreements about whether a certain type of entity objectively exists or not. Thus we may speak of realism or anti-realism with respect to other minds, the past, the future, universals, mathematical entities (such as natural numbers), moral categories, the material world, or even thought. The novelty of Dummett's approach consisted in seeing these disputes as at base analogous to the dispute between intuitionism and Platonism in the philosophy of mathematics.
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