eigenket

20 ms·

211.
by eigenket 3y ago
Bells theorem says that he predictions of quantum mechanics are incompatible with any "local hidden variable model". Experiments show that the real world appears to follow the predictions of quantum mechanics, so no local hidden v
212.
by eigenket 3y ago
This doesn't follow from Bell's inequalities. There are deterministic models of quantum mechanics which are compatible with Bell's theorem.
213.
by eigenket 3y ago
Technically true but John Paul the second's legal name was "Karol Józef Wojtyła" and the ó and ł cause a lot of badly made software to break.
214.
by eigenket 3y ago
Clouds of plasma would be a possible explanation for dark matter. Dark energy is very different and not really related in any obvious ways. That aside, clouds of plasma don't really work as an explanation for dark matter either. Plasma
215.
by eigenket 3y ago
I guess? I mean they linked to the wiki page which mentions both versions and explicitly says they're isomorphic. They could mention it explicitly in the blog as well but its clearly not the focus of this post.
216.
by eigenket 3y ago
They mentioned min-plus and the two are essentially identical (specifically they're isomorphic with the isomorphism being x -> (-x))
217.
by eigenket 3y ago
Its relevant in the context of the claim that c has short identifiers because "readability suffers with long identifiers", I dont really believe that the identifiers I listed were chosen with readability in mind.
218.
by eigenket 3y ago
Someone else gave these same examples but I find them compelling. Do you find atoi, strrchr or srand similarly clear? What about mbstowcs?
219.
by eigenket 3y ago
From the article > and the small number of dishes considered to be Devonian often involve dairy, like junket topped with clotted cream, Devonian cream tea, and the Devon (or Devonshire) split: a sweetened bun filled with whipped cream an
220.
by eigenket 3y ago
More than one party can be at fault for a problem, Microsoft pretty explicitly sold their screwdriver as a hammer.
221.
by eigenket 3y ago
Well if the screwdriver sales guy takes your bosses bosses boss and their spouse out for a nice dinner, mysteriously leading to your org purchasing screwdrivers for everyone who is asking for a hammer to do their work then maybe the hypothe
222.
by eigenket 3y ago
Haha, you think scientists have control over what software their employer buys for them to work on. There are probably wonderful places where that is the case, and probably several of those places use something like libreoffice which doesn&
223.
by eigenket 3y ago
Theres some reasonably sensible stuff here. I am strongly in favor of stuff like banning ai-based profiling of people by law enforcement, prediction of criminal offences and social scoring systems. Can you explain why you think this is comi
224.
by eigenket 3y ago
I didn't ignore what you wrote, I disagreed with it. It may be clear to you that potential infinity is the way to assess the volume of the towers but I think it is incorrect. I don't think that volume is the appropriate thing to u
225.
by eigenket 3y ago
> Actually, doesn't the notion of Planck length / Planck time Nope, we have absolutely no evidence of that. Space-time may be either discrete or continuous. Based on our current understanding we have no evidence either way.
226.
by eigenket 3y ago
Ok I think we have a wildly different way of thinking and talking about things. When I talk about "volume" what I mean is what physicists usually discuss - the volume of the universe is the number of 1 cubic meter cubes you can hy
227.
by eigenket 3y ago
I think such an argument would need quite a lot more work, the lack of Solomonoff induction doesn't mean we don't have probability theory.
228.
by eigenket 3y ago
Aleph 1 turns up when you try to (very) formally deal with probability theory, specifically when dealing with probability measures over the reals. This is sort of useful for physics for example when trying to be very careful about operators
229.
by eigenket 3y ago
I don't say it has to be isotropic, but observationally it looks very close to isotropic. There are quite clear signals we'd expect to see in the cosmic microwave background if the universe was anisotropic and they aren't the
230.
by eigenket 3y ago
I apologise, since you're the one who brought up the idea that the universe was either potentially or actually infinite I thought you might have some idea what those terms meant. By "normal" or "actual" here I meant
231.
by eigenket 3y ago
Ok, well if you come up with a definition for what a potentially infinite universe means then let me know. Until then our best models have the universe being infinite in size in the normal sense of the word.
232.
by eigenket 3y ago
That's not how physics works. We can't prove anything. All we do is come up with worse or better models, and the best model anyone has come up with so far has the universe being infinite. Finite universe models have some problems,
233.
by eigenket 3y ago
This is a common misconception, in standard models of big-bang cosmology the universe was always infinite. It was hotter and denser earlier, and is cooler and less dense later but always infinite. A decent mental model is to think about an
234.
by eigenket 3y ago
Could you explain how a potentially infinite universe would be different to an actually infinite one? I'm not familiar with how you're using these terms.
235.
by eigenket 3y ago
The spectrum of the hydrogen atom and the volume of the universe both appear to be actually infinite based on our best physical models.
236.
by eigenket 3y ago
I see, so the belief is that improved theories of physics will remove all the infinities we appear to see around us? I guess as religions go, that one is no worse than many, but there isn't really any evidence for it now. Space looks
237.
by eigenket 3y ago
Weird multi-sized infinities pop up in physics in a few places. The number of physical positions you can be in in space is uncountably infinite, the number of protons in the universe appears to be countably infinite. There are interesting p
238.
by eigenket 3y ago
I don't understand what you mean by this. What would it mean for an infinity or any number to "exist", does the number 2 "exist" somewhere in a way that infinities do not? In any case our best physical models right
239.
by eigenket 3y ago
This is how Neptune was discovered, for example. Astronomers noticed Uranus was moving "wrong" based on their physics of the time and worked out where Neptune should be based on that. When they pointed their telescopes there they
240.
by eigenket 3y ago
The list includes the neutrino (added to explain missing momentum in observed nuclear decays), the Higgs (added to explain mass which would otherwise not make sense in electro-weak theory) and arguably antimatter (added to fix incompatibili

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