Positive Energy Warp Drive from Hidden Geometric Structures • Hacker News Board

Re: Positive Energy Warp Drive from Hidden Geometric Structures

#191

Post by nl » Thu, Jul 15, 2021, 7:18 AM UTC

drran wrote: post #185

nl wrote: post #183

Earlier quoted context omitted.

These responses are correct. I'll add: 3) yes I read it. It's an example Einstein created, so possibly worth responding to the points made there rather than attacking me for "not reading it".

If you read it and understood it, can you show us how to apply this formula to the warp drive, please? I cannot ask Einstein, obviously.

It exactly applies to a warp drive. Just saying "warp drive" doesn't have magical qualities - it's exactly what Einstein was talking about.

So you put in the numbers in the same way as that numerical example on Wikipedia, and it shows the same thing.

Edit: the only exception I can think of is if causality can be reversed.

Re: Positive Energy Warp Drive from Hidden Geometric Structures

#192

Post by tripzilch » Thu, Jul 15, 2021, 8:46 AM UTC

T-A wrote: post #113

potatoman22 wrote: post #106

Earlier quoted context omitted.

I don't think we know that time's arrow is caused by the second law. Isn't that just a theory?

https://www.scientificamerican.com/article/just-a-theory-7-m...

8. Bonus misuse: The term "science words" is not really used in academic literature

You can't be a scientific american if you keep using the science words bad.

It's like cargo culting science: Use these words correctly if you want to seem to know what you're talking about!

But anyone who actually knows what they are talking about would use these words correctly, or at least not be mistaken about their meaning.

So this article is teaching people that have no idea what they're talking about, how to sound like they do.

Maybe it's time we start using another language for science. Clearly it's confusing the Scientific Americans.

Re: Positive Energy Warp Drive from Hidden Geometric Structures

#193

Post by circlefavshape » Thu, Jul 15, 2021, 12:32 PM UTC

harpersealtako wrote: post #164

circlefavshape wrote: post #146

Earlier quoted context omitted.

I've never managed to see how causality is a problem for FTL travel If we perceived the world through sonar then causality would be violated by anything supersonic. If you were shot then you'd feel the bullet first and then "see" it moving back into the gun. AFAICS if information can travel at >c, then physical objects traveling at >c doesn't violate causality

Here's a good explanation of why FTL causes causality issues. http://www.physicsmatt.com/blog/2016/8/25/why-ftl-implies-ti... The sonar example works only if everything is traveling in roughly the same frame of reference. You're not accounting for relativity and its effects on space and time in your analogy.

I still don't get it. That analogy assumes that light is the only way causality information can be transferred - i.e. if I see the phone call being placed before its sent then it seems like causality is violated. But it I look at what's happening via the FTL phone then I can see that it's not

Re: Positive Energy Warp Drive from Hidden Geometric Structures

#194

Post by effingwewt » Fri, Jul 16, 2021, 1:11 AM UTC

evilduck wrote: post #189

ISV_Damocles wrote: post #161

Earlier quoted context omitted.

Here's why I believe you are being downvoted: 1. The original topic was about Ender's Game only, not the entire series, so you basically shifted the goalposts. 2. More importantly, I think you are using the wrong literary terminology and you and the others are talking over each other. Where you say "plot point" I believe you meant "plot device." The Ansible is definitely the primary plot device that makes so much of…

FWIW I explicitly said "Ender's Game series". I think you're also redefining "plot point" to just be "plot". A plot point is simply an event that impacts what happens next. The reveal of FTL data happens late in the book but it is definitely both a plot point and a plot device. For the greater series though, it's basically the core concept of the story arc's plot.

Appreciated, I wasn't meaning to be rude, just love talking about this series in particular.