Knusper
@Knusper@feddit.de
- Comment on Could we send electric data across time? 10 months ago:
And you wouldn’t have to reverse causality to travel backwards in time. You would just have to travel faster than the speed of light.
If you can travel faster than the speed of light then you can arrive at a destination before you left.
I know practically nothing about all the wormhole theories, because I just don’t consider them relevant, but from a logical standpoint, the above does not feel correct to me.
The thing is, you would arrive at your destination before the light would arrive there from where you started. So, you could take out your telescope and potentially watch your own launch.
But that doesn’t actually put you into the past. It just looks like it when looking into the direction you came from. Light from the other direction will look like you’ve fast-forwarded through time, because you now get more recent imagery.
I don’t have another explanation why someone might think, this might put you into the past…
- Comment on Could we send electric data across time? 10 months ago:
Hmm, but why do you think these things haven’t occurred yet?
As far as I can tell, the speed of causality means things can have occurred in a certain location in the universe, but it takes time until the effects have permeated into the rest of the universe.
So, it’s like a shockwave from an explosion. The explosion happens, but it takes a few seconds until you feel the shockwave.
Well, with the difference that you can see an explosion before the shockwave. When we’re at the speed of causality, literally no evidence will have arrived in your position until it does.So, one could go meta-philosophical with basically “If a tree falls in a forest and no one has heard it yet, did it actually already happen?”, but yeah, I don’t think that’s terribly useful here.
And well, if we treat it like a shockwave, let’s say you detonate some TNT and step through a wormhole to somewhere 20 km away. You would know that the shockwave will arrive soon, but does that matter? The shockwave will still just continue pushing on.
And I guess, crucially, it did already happen, so you can’t do the usual time travel paradox of preventing that it would happen.
- Comment on Could we send electric data across time? 10 months ago:
That’s actually not as obvious as it might sound. The thing is, as far as we know, light seems to have no mass¹. No mass means no inertia. So, if it accelerates at all, it should immediately be at infinite speed. But for some reason, it actually doesn’t go faster than what we typically call the speed of light. And we assume, that’s the case, because that’s actually the speed of causality.
So, it’s reversed. It’s not that light is just the fastest thing and as a consequence of that, nothing can be transmitted faster. No, it’s actually that there appears to be a genuine universal speed limit and light would be going faster, if it could.
¹) Light is still affected by gravity, e.g. can’t escape from black holes. We do assume that gravity is just a ‘bend in spacetime’ because of that, meaning even any massless thing are affected by it, but yeah, we’re still struggling to understand what mass actually is then.
- Comment on Could we send electric data across time? 10 months ago:
Well, I’m going to give the party-pooper response, even though science fiction and pop-science love to fantasize differently:
The past and the future are theoretical concepts. They don’t actually exist in the sense that you can ‘send’ something to them.
Obviously, you can write data to a hard drive and then read it out after a week has passed, but presumably that is not what you had in mind.But that’s also the essence of the time travel that the theory of general relativity allows. You can travel forwards more slowly along the time axis by travelling more quickly on the space axis (close to the speed of light), which means you might just need to spend 5 perceived years to end up in the year 2200.
Similarly, you could take a hard drive onto this journey and it wouldn’t have fallen apart in that time.Travelling back in time makes no sense in general relativity. You would need to reverse causality for that, which is on an entirely different level from merely slowing causality down.
General relativity would mathematically allow for the existence of wormholes, but that’s pushing the theory to extremes where it might simply not be applicable to reality anymore. We certainly have no actual evidence for wormholes.
- Comment on What is the point of individually wrapping cheese slices in plastic, only to cover a bunch of them in more plastic? 10 months ago:
So, what’s the yellow stuff for? To keep the bags from sticking together?
- Comment on Against the Storm Review - An Ambient Roguelite City Builder 11 months ago:
I’m not saying they’re mutually exclusive, I just find it tricky to draw information from that.
For example, I correctly assumed this to not be akin to Dungeon Keeper, which would be a city builder like Rogue in the sense of it being a dungeon crawler.
But at the same, I guess, I assume Against the Storm would have procedural map generation like Rogue did, even though I don’t really consider that typical for city builders.And yeah, this fuzziness of the term ‘roguelite’ means I don’t really know how much city builder to expect…
- Comment on Against the Storm Review - An Ambient Roguelite City Builder 11 months ago:
Ah yes, a city builder, which is a genre pretty much opposite to the original Rogue, but make it like a lite version of Rogue. 🙃
I mean, I don’t really care. Words change meanings. But this one does hurt my brain quite a bit, trying to understand which parts of the Rogue formula they kept…
- Comment on Whats with the sudden indie output from South Korea? 11 months ago:
Tangentially is 2023 chock full of great games because the pandemic held up the development of so many studios?
I know, they all announced that, but as a software dev, I really don’t see why this should be the case. We largely just moved into home-office and continued working, often even at increased efficiency. I guess, building games might require somewhat more creative sessions, which are generally more productive in person, but I don’t see that making a huge difference.
My impression was rather that they had the usual delays, with maybe a few hickups at the start of the pandemic, and then they just declared the pandemic the whole reason for the delays.As for 2023 being so full, the pandemic meant lots of people were at home, consuming digital goods. It caused a massive boom in the gaming industry. I imagine, lots of studios were able to secure (bigger) budgets during that time, which are now coming to fruition.
- Comment on ‘It’s amazing’: scientists analyse 4.6bn-year-old dark dust from Bennu asteroid 11 months ago:
Well, yeah, to some degree this was a shit take of “ackshually everything in the universe has existed in some form, at least since the Big Bang, quite possibly longer”.
But to some degree, it also just felt like a weak explanation for the excitement, because even on Earth, you can drill into some rocks and find material which has been left untouched for a similar timespan.
While Earth also formed 4.6bn years ago, its crust did not cool out right away, so it would be valid, if they’re specifically excited about this (comparatively) tiny timeframe.
But reading the actual article, it rather sounds like the more obvious excitement is, that it is simply dust from an asteroid and it hasn’t been mostly burnt up from the usual way of asteroids entering Earth’s atmosphere. - Comment on ‘It’s amazing’: scientists analyse 4.6bn-year-old dark dust from Bennu asteroid 11 months ago:
which at 4.6bn years old dates back to the dawn of the solar system
…unlike all the other dust, which popped into existence three days ago.
- Comment on ‘No no no. Avoid them all’: anti-vaccine conspiracies spread as UK cases of measles increase 11 months ago:
But she doesn’t know who to trust. “I’ve done some research but feel like a lot of the info on the web is pro-vaccine,” she writes.
Really makes you wonder, why that would be the case.