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Is gravity just entropy rising? Long-shot idea gets another look

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Re: Is gravity just entropy rising? Long-shot idea gets another look

#161
post #40

As an experimental physicist, I refuse to get excited about a new theory until the proponent gets to an observable phenomenon that can fix the question.

Between two models the one with the shorter Minimum Description Length (MDL) will more likely generalize better

Re: Is gravity just entropy rising? Long-shot idea gets another look

#162

Earlier quoted context omitted.

But where did the Sun got it's low entropy photons to start with? From gravity, empty uniform space has low entropy, which got "scooped up" as the Sun formed. From the Big Bang originally. We don’t know what caused the Big Bang.

The end of the previous Big Bang, a-la Big Bounce ;^) "It's turtles all the way down."

One of the major challenges with "Big Bounce" that media coverage of it tends to overlook is that it is not entirely clear how the previous universe, which is presumably high entropy if it's supposed to be like ours, becomes the low entropy feedstock for the next universe. There's still a "And Here There Be Magic" step there.

I'm not saying there's no solution; indeed, this is the sort of thing where the problem is that the profusion of proposed solutions is exactly the thing that shows there's a problem there. I think people tend to intuitively think that "lots and lots of possible solutions" is somehow better than "no solutions at all" but they're actually nearly the same thing.

Re: Is gravity just entropy rising? Long-shot idea gets another look

#163

Earlier quoted context omitted.

You’re right. the cadence is written by ChatGPT. I’m pretty terrible at keeping my thoughts cohesive, so I often use it as a post processor. I’ll try not to do that. Because you had the decency to respond, I’ll spent some more time thinking about this and see if I can come up with a more well rounded response that incorporates more of the traditional language of physics. But to your point about entropy not being a “f…

> would you rather have a book that explains everything and not know how to read it, or trust your own eyes ears and hands, and not be able to share it? Maybe use AI to help you understand TFA instead of writing gut reactions to the title.

I... Do... With quite a lot of articles... And I build semiconductors in my garage using what I learn.

I just don't see how this particular article would be beneficial, even if it _were_ correct.

Re: Is gravity just entropy rising? Long-shot idea gets another look

#164

Entropic gravity is like the "brazil nut effect" [0] [1]. The idea is that if you shake a glass full of different sized nuts, the large ones will rise to the top. From what I understand, this is because larger objects have more mass, moving slower when shaked, so as the larger (brazil nuts) don't move as much relative to the smaller ones (peanuts), and because of gravity, there's a cavity left under the brazil nut wh…

but these nuts move by gravity do they not? and what in the universe is exactly up and down? and why would that matter?

are all celestial bodies then a local up and 'away from them' down?

this analogy hurts my brain. please tell me how to make the hurting stop

Re: Is gravity just entropy rising? Long-shot idea gets another look

#165

This seems backwards. Entropy is a dispersive force — it favors distribution and disorder. But the universe clumps. Planets, stars, galaxies — all of them are low-entropy configurations. So how did scattered dust particles form the planet we’re standing on… through entropy? If gravity is just emergent from entropy, then it should be fighting against planet formation, not causing it. There’s a missing piece here — may…

This is not a philosophical discussion

This paper is literally physical philosophy. To be science, it would require recursive experimentation, observation, and adjustment to hypothesis, until the model it proposes becomes a stable, reliable, and (most importantly) useful interpretation.

It does none of that, and so I have no responsibility to do so prior to discussing it.

Re: Is gravity just entropy rising? Long-shot idea gets another look

#166

Earlier quoted context omitted.

Entropy isn't a force. It doesn't "favor" anything. Its a property of statistics, information, and distributions. Also why does this have that particular ChatGPT social media post rhythm to it? Please, Lord, tell me we haven't reached the point where people are writing HN comments w/ AI.

Because it has emdashes and ellipses that Chrome, Firefox, Mac, Linux, and Android text input controls do not natively produce. I don't know about iPhone. If you see these artifacts, it was authored in some other software (be it an editor or LLM) and pasted over.

I like how people are recognizing "OH THIS IS TOKEN OUTPUT", and that's like... the only thing you can come up with to refute the argument?

Like not the actual content or meaning of the text, which I chose to post, but the mere fact that it wasn't typed in to a keyboard directly in a hacker news text box, but rather pasted after using a tool to refine the verbiage.

Honestly? Great test for most posts. We live in a world surrounded by people who are just copy and pasting ChatGPT answers like a magic 8 ball, and I respect your instinct to try to avoid those.

But that's not how I use ChatGPT, because I understand how language models work and choose to use them intentionally to help me nagivate ideas and learn new concepts (as well as write memos after-the-fact). Not just take a hollow "sounds good" response and post it to take up people time.

:shrug:

Re: Is gravity just entropy rising? Long-shot idea gets another look

#169

Entropic gravity is like the "brazil nut effect" [0] [1]. The idea is that if you shake a glass full of different sized nuts, the large ones will rise to the top. From what I understand, this is because larger objects have more mass, moving slower when shaked, so as the larger (brazil nuts) don't move as much relative to the smaller ones (peanuts), and because of gravity, there's a cavity left under the brazil nut wh…

but these nuts move by gravity do they not? and what in the universe is exactly up and down? and why would that matter? are all celestial bodies then a local up and 'away from them' down? this analogy hurts my brain. please tell me how to make the hurting stop

You need to reread the middle only. It's a kind of "vacuum" effect.

Re: Is gravity just entropy rising? Long-shot idea gets another look

#170

Entropic gravity is like the "brazil nut effect" [0] [1]. The idea is that if you shake a glass full of different sized nuts, the large ones will rise to the top. From what I understand, this is because larger objects have more mass, moving slower when shaked, so as the larger (brazil nuts) don't move as much relative to the smaller ones (peanuts), and because of gravity, there's a cavity left under the brazil nut wh…

In other words, gravity would be explainable by statistical mechanics (like heat)?
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