I don't have a position, but here are the options: 1. "there are unknowable truths" is knowably true 2. "there are unknowable truths" is unknowably tr...
“All truths are knowable” cannot be unknowably true. Therefore one of these is true: 1. “All truths are knowable” is knowably true 2. “All truths are ...
Here's a scenario: P1. Only John exists P2. John believes that something other than himself exists C1. Therefore, John holds a false belief P3. (optio...
But to offer a more substantive response, one of these is true: 1. "all truths are knowable" is true and knowable 2. "some truths are unknowable" is t...
They do, e.g. by adopting intuitionist logic. That's not the antirealist thesis. The antirealist thesis is that something is true only if it can be de...
I think a simple solution is to use a restricted knowability principle: ?p?q((p ? (q ? ¬Kq)) ? (p ? ?Kp)) For all p that doesn't entail that some q is...
Well, let's take the SEP article: So the anti-realist doesn't claim that all truths are known, only that all truths are knowable. Fitch attempts to re...
I was mostly addressing this: The claim is that the only things that are true are things that can be known to be true. Fitch may attempt to prove that...
You mention Fitch's paradox, which is also an argument against mathematical constructivism, and as you said in an earlier post, "I have however also d...
And there is a person. That person remembers growing up as you, not as Jane. Your claim is that this person is Jane because it's Jane's body and my cl...
"So-and-so is a wife only if she has been legally married" does not mean "so-and-so is a wife only if she has the potential to be legally married". So...
According to some anti-realists, X is a cup only if it stands in a certain kind of relationship with us, just as X is a king only if it stands in a ce...
"John is a man" being true is consistent with but has nothing to do with "Jane is a woman" being true. I'm not sure how that distinction applies to th...
I explained it quite clearly in that post: P1. A cup exists if and only if there exists some X such that X is a cup P2. For all X, X is a cup only if ...
There's a reason that a "brain transplant" is also called a "whole-body transplant". https://en.wikipedia.org/wiki/Brain_transplant I think this is th...
The brain has all the connections it had before it was removed from your body, so she will have your memories. And I think that's absurd. It's not the...
That doesn't answer my question. Jane's brain is removed and replaced with yours. According to you, it's still Jane. But given that memories are store...
An upload is just a copy, it's not me. It's not like there's some physical substance that is literally removed from my brain and placed on a computer ...
I'm curious; let's assume that brain transplants are possible and easy and that you have been diagnosed with terminal brain cancer. Would you accept a...
So, for you, a brain transplant is a memory and personality transplant? Jane receives your brain and with it loses her memories and personality but ga...
I'm undecided. I don't know whether consciousness is reducible to neurological activity or if it's some (non-physical?) supervenient phenomenon. I am ...
They probably wouldn't, because the grammar of ordinary language does not follow the rules of propositional logic. In propositional logic, the followi...
If it is raining then it is not raining Therefore, either it is not raining or it is not raining Therefore, it is not raining It is raining Therefore,...
The conclusion logically follows, as has been explained many times. P ? ¬P ? ¬P ? ¬P ? ¬P P ? ¬P Or more simply: ¬P P ? ¬P The only issue is that peop...
Not all anti-realists claim that. This is the sort of argument that an anti-realist might make: P1. A cup exists if and only if there exists some X su...
As discussed in the other thread, if the antecedent is false then the material conditional is true, i.e “if P then Q” is true if “P” is false. There w...
I'm just considering a very simple example; Jane and I are decapitated, but our heads (and so brains) are kept alive. Jane's head (and so brain) is at...
Just as being a king is not a property/condition that is reducible to mere material composition and location in space and time it can be argued that b...
I'm not saying that he's not Jane because he doesn't have Jane's memories; I'm saying that he doesn't have Jane's memories because he's not Jane. I th...
Take two questions: 1. Is the king in the palace? 2. Is the cup in the dishwasher? Do we understand (1) extensionally as being about Charles, such tha...
If "P" is false then "If P then Q" is true. I am not American, therefore, "I am American" is false, therefore "If I am American then I am the Presiden...
You're not talking about validity there, you're talking about the truth of an "if ... then ..." premise. In propositional logic "if Michael is America...
I think it's important to recognise the distinction between intension and extension. As an example; if the monarchy in the UK is abolished, does King ...
Consider it from your perspective. You undergo the operation. When you wake up do you start identifying as Jane simply because you have her arms and l...
In the case of gradual updates, yes, much like the Ship of Theseus. This is the only way I can imagine something like "mind uploads" to actually work ...
That isn't my definition. Someone in hospital on a ventilator is still a person. I'm speaking to a person. Remove someone's limbs and they're still a ...
Or for a real example there's Vladimir Demikhov, who transplanted the upper body of one dog onto another. https://img2.thejournal.ie/inline/797403/ori...
The brain uses the lungs and mouth to speak. Much like right now you are using a computer/phone to speak to me. For the sake of this discussion we are...
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