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Research suggests Big Bang may have taken place inside a black hole

port.ac.uk

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Re: Research suggests Big Bang may have taken place inside a black hole

#551
As a lay reader, it sounds like they are assuming what they are trying to prove.

Yes, it produces a testable prediction, but seemingly based on a mathematical assumption derived from our observed cosmic radiation background.

> This lower bound follows from the requirement of χk≥χ∗≃15.9 Gpc to address the cosmic microwave background low quadrupole anomaly

As a lay reader, can I assume that no scientist would publish a theory with mathematical circularity (at the heart of the prediction)? I sure can't verify it myself.

Re: Research suggests Big Bang may have taken place inside a black hole

#552
post #515

I have two problems / questions with this: 1. This theory requires a parent universe that can't have been formed inside a black hole. This means there must a be second "universe creation" mechanism that we can / may never know about from our child universe. For me, this doesn't really answer the true question: "How did our universe begin?" Yeah, it may the "unknown field with strange properties" but instead we get an…

I don't see this idea as very new. There are many models of black holes, such as the Schwarzchild solution, that have an area of "asymptotically flat spacetime" which is, from the viewpoint of our universe, part of the black hole. That something happens around the singularity that creates this new universe doesn't sound that crazy. If our universe is a child of another universe and that is a child of another universe…

> we're lucky to be in one we can live in

Nitpick: We couldn't be anywhere else, except nonexistent.

Re: Research suggests Big Bang may have taken place inside a black hole

#553
post #431

Earlier quoted context omitted.

Sabine Hossenfelder cast herself out from academia and took a recent turn to monetizing laundering peoples vague understanding string theory is a waste of time (cannot be proven empirically) into academia is doing fake work and if they'd apologize and own up to it, maybe we would trust them again. Most famously, through a bizarrely written letter from an anonymous whistleblower pleading that she not topple the academ…

I can't parse either of your sentences. Maybe you could introduce some intermediate variables, or use parentheses to give them structure?

I can't parse what you're asking for :|

Ran my comment + your reply through AI and asked it to respond to you, as I do want to help. Let me know if there's other instructions I can give it, it may have taken your variable ask too literally? :(

Here's its output:

Sabine Hossenfelder, after distancing herself from academia, has recently pivoted to monetizing a specific narrative: Let’s define Premise A as “String theory is a waste of time because it cannot be empirically proven.”

She generalizes from Premise A to a broader Claim B: “Academia, more broadly, is producing fake work.”

Her argument seems to imply that:

If academia were to publicly acknowledge this, or apologize for promoting unverifiable theories, then the public might begin to trust it again.

This general thrust reached a kind of crescendo in one of her more notorious moments: — An oddly written letter, allegedly from a whistleblower within academia, essentially begging her not to “bring down the system.” The letter’s rationale? That dismantling the status quo would destroy the livelihoods of thousands of academics who, according to the letter, are fabricating just enough plausible-sounding work to secure grants and stay afloat.

Re: Research suggests Big Bang may have taken place inside a black hole

#554
post #531

Earlier quoted context omitted.

Yes, it doesn't imply, but parallel universes is one of possible interpretations.

If you are referring to the many-worlds interpretation, that’s exactly what I’m talking about. There is no implication in many-worlds that every conceivable world exists as a branch of the actual wave function. See also https://news.ycombinator.com/item?id=44253344 .

I fail to see how this doesn't lead to "every possible world". Maybe some edge cases are ruled out, but it seems to imply every possible world as far as what that means to the imagination.

Re: Research suggests Big Bang may have taken place inside a black hole

#555

"In my room, redefinin' the meanin' of black holes" - Earl Sweatshirt

I went to school in a very bad neighborhood. Once I was sent to the office because my math teacher asked me what I was reading about that was soo much more interesting than our textbook. I happened to be reading "A Brief History of Time", so I answered "black holes." At the time I couldn't understand why my dad laughed about that particular phone call from the principal.

Hahahahahahahaha

Re: Research suggests Big Bang may have taken place inside a black hole

#556

Earlier quoted context omitted.

Implying there’s no such thing as randomness, at any level?

No randomness when taking everything into account. I’m not an expert but I still hold out hope that if you know more about the universe than humanity does everything will be known to be deterministic. Also implies that all singularities of the same mass are identical. I think this should be less bold of a statement. Let’s speculate that the more mass in the singularity would correspond to higher iterations in somethi…

That would mean that beings getting to know everything about the universe at some point and realizing it's deterministic was always pre-determined

Re: Research suggests Big Bang may have taken place inside a black hole

#557
I've spent the past month or so immersed in Penrose diagrams. Some of the implications of the math and diagrams include white holes (opposite of black holes - spew matter outwards), infinite universes contained within one another other, anti-gravity universes, and things like this. You can also fall into a black hole and make it out into another universe instead of meeting the singularity (at least, an idealized, rotating black hole). Anyway, cool stuff.

Re: Research suggests Big Bang may have taken place inside a black hole

#558
post #531

Earlier quoted context omitted.

Yes, it doesn't imply, but parallel universes is one of possible interpretations.

If you are referring to the many-worlds interpretation, that’s exactly what I’m talking about. There is no implication in many-worlds that every conceivable world exists as a branch of the actual wave function. See also https://news.ycombinator.com/item?id=44253344 .

The math does imply infinite universes. There are many physicists who believe that all these worlds do exist.

See also: https://en.wikipedia.org/wiki/Many-worlds_interpretation

And a video: https://www.youtube.com/watch?v=dzKWfw68M5U&list=PLsPUh22kYm...

Re: Research suggests Big Bang may have taken place inside a black hole

#559

Earlier quoted context omitted.

Implying there’s no such thing as randomness, at any level?

No randomness when taking everything into account. I’m not an expert but I still hold out hope that if you know more about the universe than humanity does everything will be known to be deterministic. Also implies that all singularities of the same mass are identical. I think this should be less bold of a statement. Let’s speculate that the more mass in the singularity would correspond to higher iterations in somethi…

While I doubt you’re unique in this, I think this is the first time I’ve seen someone say they hope there’s no such thing as free will.

Can you explain why you hope everything is deterministic?

Re: Research suggests Big Bang may have taken place inside a black hole

#560

Earlier quoted context omitted.

The Bullshit Jobs jobs theory has been widely discredited by researchers, but you probably won't believe them. Consider that most business is B2B so it makes sense that the casual observer would not know what it's for. Additionally, the Bullshit Jobs book relies on a magazine survey, actual studies shows that the percent of people who consider their jobs meaningless is very low and also decreasing over time

> the percent of people who consider their jobs meaningless Worth to point out that there is a huge difference between people considering their jobs meaningless AND their job being meaningless, though.

No, but it's a core part of the Bullshit Jobs theory, that the jobs are obviously bullshit to everyone involved. I would suggest that most jobs that aren't particularly valuable are probably not locally recognised as such (i.e. by the person or by their manager).

(In general I think while plenty of people are familiar with varying levels of pointless effort in their jobs, it's rare that a whole job consists of that, at least as far as the person doing it and the person hiring for it are concerned)

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