Veritasium | Something Strange Happens When You Follow Einstein's Math | Reaction !!!

Divide by Zero ...

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[winter]

It is so nice to see a reaction to this from someone who actually seems interested in this stuff and has some foundational knowledge. This was a joy to watch. Please do more of these reactions.

[commonsense-oggz]

it may be possible that the quantum particles, that are popping in and out of existence around us, may be due to white holes allowing subatomic particles to pass into this universe. we just can't see it due to the light cone issue.

[senokir]

It seems to me that we have come to some understanding, or at least assumption, about how spacetime can be infinite which is the basis of defining the boundaries of the Penrose diagram in the way that we do which we don't question. But then when it comes to something like a singularity and the logical conclusions that can be drawn from that, we seem to have a hard time accepting that these conclusions *could* be possible. There is this insinct to say "well of course antiverses and white holes and wormholes and all of that can't exist. Just because the math exists doesn't mean anything because you have to apply the properties of the actual universe and surely there must be some reason that can't exist." I think it would be accurate to say that "we haven't observed and understood anything in our universe which supports this". Similar to how we had a picture of a white dwarf before we understood what it was and it was only after we developed the theory we were able to make that connection. Even though it was possible to observe such a phenomenon, and in fact we *had* observed it, the information meant nothing to us - perhaps we have also observed or could observe evidence to support the existence of white holes for example.

Humans haven't been around that long in the grand scheme of things and the time that we have been actively gathering and analyzing information about our universe is even more absurdly short that to use our current understanding of science to eliminate possible theories which are supported by math simply because they don't line up with our current observations is ridiculous in my opinion. To put it another way, I think that it is only meaningful to use our observations to draw positive conclusions about our universe. That is to say "I observed an apple falling and can use this equation to describe how that happens" is a logical thing to do. To take it further and say "I have observed gravity attracting matter together therefore it is impossible that matter can repel instead" is illogical since you are not describing something that you have observed but are rather trying to draw a conclusion about something you haven't observed by using evidence that you have observed. I'm not saying that wormholes and all of that does exist but rather that it seems strange to me to claim that they *can't* exist (See also Black Swan Theory). Especially when it doesn't seem particularly controversial to say that spacetime is infinite. Why do some people choose to draw a seemingly arbitrary line about what can and can't exist in our universe? Particularly when infinite spacetime seems just as absurd to me as infinite gravity and all of the logical conclusions that arise from that.

Additionally, while I admit that I am certainly not familiar with everything that we have theorized mathematically about our universe nor with everything that we have observed, I'm unaware of a time when something was described by math and then proven to be impossible. However, I am aware of many such examples of the opposite - things are often theorized using math and then proven to exist afterwards through observation. Math seems to be inherently tied to the nature of our universe. It isn't something that we just made up, it is something that we are discovering. Assuming that there is intelligent life elsewhere in the universe I have to imagine that they have the same math that we do. They may have a deeper understanding of it than us, but 1+1 is still 2 no matter how you look at it.

To be clear I am not commenting on any statement that you made but moreso on the seemingly common attitude of dismissal that we see the last scientist, Juan Maldacena. I accept that he is a subject matter expert and I am not, but that doesn't mean that he is immune to psychological bias or incapable of sucumbing to logical fallacies like any other scientist (or human for that matter) and I do believe that it is possible for a nonsubject matter expert such as myself to follow his line of logic and point out flaws in the logic without having to understand the subject matter itself since the logic itself isn't dependent on the subject. It really feels akin to someone saying "well of course there's no southern hemisphere!" Of course the claims that are being theorized with this math are far more difficult to test than whether or not a southern hemisphere exists but the claim that there mustn't be wormholes seems just as ridiculous to me as there mustn't be a southern hemisphere.

[jacksmith]

I am currently writing my masters dissertation on Black Holes in General Relativity. I thoroughly enjoyed this video! Keep it up; it’s so refreshing to see somebody express genuine interest and not be afraid to wade through these concepts. Bravo, sir. 👏

[EricaCalman]

I mean on some level it's not even that complicated, you just apply Einstein's equation to the Schwarzschild metric and you get a bunch of divergences. It gets tricky because naively there's infinnite curvature at the event horizon but that isn't quite true and you have to do a convoluted set of transformations to get a more valid understanding of the event horizon and only get a true singularity at the center.