Per MWI, worlds are persistent structures that emerge as a consequence of decoherence. In that sense, an MWI world doesn't depend on observers. David ...
Yes, me too. Yes, so Chen and Li's experiments are an argument for necessity. The gist is that an entanglement swapping protocol is followed such that...
Yes, though those alternative formulations are non-local (i.e., require faster-than-light communication for measurements) and therefore don't integrat...
If locality is the case (per QFT) then the correlation is a consequence of the SPDC. However, unlike with the gloves, the final measurement values are...
SPDC converts a photon into two entangled photons, each with half the energy of the original photon. For Type II SPDC, this prepares the singlet state...
If locality is the case, then the common cause of the entangled particles' correlation is their initial preparation (see spontaneous parametric down-c...
The particle measurement events aren't causally connected (i.e., correlation is not causation). So the precedence order need not be preserved in all f...
No, quantum entanglement says measurements will be correlated - a very different thing. As physicist Asher Peres noted, "relativistic quantum field th...
OK. Time dilation and length contraction are related in the expected way. If you travel half the distance (i.e., at 87% of the speed of light), then i...
Just grounding the thought experiment in some real numbers - there needs to be Lorentz symmetry between the observers. Weren't you also asking a quest...
At that speed, there is no appreciable difference between the distance for you and the stationary observer. Your velocity would need to be six million...
:up: I think ChatGPT meant "edge" in the higher dimensional sense, where the finite/infinite distinction is relevant. We can say that the Earth has no...
I put your question to OpenAI's ChatGPT. I've also included some of my own questions (based on the above exchange between @"staticphoton" and @"noAxio...
That's how I see it as well. I think part of the problem is that there are many different tracks along which disagreement and misunderstanding can occ...
:up: As Feynman once noted, “The first principle is that you must not fool yourself — and you are the easiest person to fool.” I think that's right. T...
In this case, it's the cow that he saw that establishes his conclusion that there's a cow in the field. He is mistaken about which cow he saw, but tha...
:up: I would just add, though, that the causal connection may not always be sufficient for knowledge. Consider the fake barn scenario. In that case, t...
Indeed. The claim can no longer be justifiably held at that point since knowledge does require truth and the claim in question is now known to be fals...
Yes, my view perhaps differs from Lewis' in that regard. In the case of the clock example, I know it's 3pm as long as I see that the clock says 3pm an...
A lemma, here, is a premise of one's purported knowledge. So the stated premise in the case of the robot dog was that James had observed an apparent d...
Yes. I think it's a reasonable view that the lemma be knowledge (which admittedly is a higher standard than simply truth), but it does need to be cont...
I regard the "no false lemmas" condition as essentially correct. The criticisms are really around what counts as a lemma. But if one is to construct a...
That's correct. There is also nothing about the definition of "negation" which requires that the result be other than the starting number. You're equi...
They're comparable because in each case the number remains the same. On that basis you reject that a negation has occurred but, apparently, still acce...
Do you also hold that adding zero to a number cannot be called "addition" because the number is the same before and after? Or that dividing a number b...
It is neither. The negation of zero (a number without a sign) is zero (a number without a sign). The number does not change. You need to be more speci...
Thank you. Since the unary negation of zero (-0) is a perfectly valid operation, I disagree. Note that your objection can equally be levelled at "add"...
No. Renner addresses criticisms, including Aaronson's which is the "agent's brain" sentence below. Assumptions Q, S and C are what Aaronson describes ...
Yes, that's right. Plain old "quantum weirdness" is when a system is in a superposition of state 0 and state 1. Wigner-grade "quantum weirdness" is wh...
I have, twice. But here it is again with the relevant parts bolded: Yes, I understand. On your definition, the mathematical expression "-(-0)" would b...
Yes. In terms of the thought experiment, Wigner can wait ten minutes, then enter the lab (collapsing the lab wavefunction) and the friend will report ...
I appreciate the comment! I think a realist grammar is fine. We are already used to sentences like the Liar and "The King of France is bald", with dif...
I also go with 3. I just meant in their capacity as a physicist. The quantum mechanics issue is ostensively about counterfactual definiteness, not fac...
So, according to you, your preferred definition of opposite precludes the mathematical definition of opposite. Even though the subject we are discussi...
In quantum mechanics realism usually refers to counterfactual-definiteness, which is "the ability to speak 'meaningfully' of the definiteness of the r...
Such as reflecting the positive number line over the origin and reversing the sign of the reflected numbers. In other words, positive and negative num...
That the particles are entangled only means that there will be a correlation between the two spin measurements. As physicist Asher Peres noted, "Bell’...
See the mathematical definition below. A picture for this is that walking forwards three steps and then walking backwards three steps returns you to y...
There are also two distinct conventions for natural numbers and integers (which include negative numbers). With integers, a larger number can be subtr...
Here's Heisenberg on the issue: Now consider the introduction of negative numbers: The math was entirely adequate but there was no natural picture, he...
Nicely put. I think this also relates to Gilbert Ryle's examples of category mistakes. The color of a ball is not reducible to the ball's machinery, s...
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