If time travel to the past cannot be done does that make the future fixed?

Just wanted to add that time travel is "personal." Time is only perceived on an individual level, and there is no such thing as "objective time." So if you go back to the past you will still remember the other life you already lived in the same years numbered out after your arrival in the past. But as far as the non-traveling people are concerned, nothing has changed for them.

If you killed your grandfather before your father was born, you'd just continue to live out your life remembering your grandfather and father, but now you'd also remember killing Gramps and what came after that. If you pulled a Marty McFly and went "Back to the Future," you'd still be alive, but it would seem that you appeared out of nowhere, and there would be no record of you.

You'd be like that stranded dude from Taured. But the point is that nothing changed because none of the stuff you did in the first life ever happened. There being no record of you isn't a change. That's the way it always was. Your future is always exclusively yours.

originally posted by: Blue Shift
Just wanted to add that time travel is "personal." Time is only perceived on an individual level, and there is no such thing as "objective time." So if you go back to the past you will still remember the other life you already lived in the same years numbered out after your arrival in the past. But as far as the non-traveling people are concerned, nothing has changed for them.

If you killed your grandfather before your father was born, you'd just continue to live out your life remembering your grandfather and father, but now you'd also remember killing Gramps and what came after that. If you pulled a Marty McFly and went "Back to the Future," you'd still be alive, but it would seem that you appeared out of nowhere, and there would be no record of you.

You'd be like that stranded dude from Taured. But the point is that nothing changed because none of the stuff you did in the first life ever happened. There being no record of you isn't a change. That's the way it always was. Your future is always exclusively yours.

It's more complicated than that. If you could go back to the past (which is impossible for many reasons) and change anything, it would become a different timeline. It would then run its own course, separate from the timeline you came from.

Back to the main idea, the notion of paradox:

io9.gizmodo.com...

I am not exactly sure quite yet, I will have to run some scenarios in my head.

You all bring fascinating points. Please don't be afraid to critique or call out logical fallacies, as this aids in progression.

originally posted by: ginseng23
Back to the main idea, the notion of paradox:

io9.gizmodo.com...

I am not exactly sure quite yet, I will have to run some scenarios in my head.

You all bring fascinating points. Please don't be afraid to critique or call out logical fallacies, as this aids in progression.

Interesting article. But it all boils down to the fact (as I see it) that you cannot change your current timeline by going to the past and changing something. If you ever managed to go back and change something, it would be a different timeline. Skynet has been defeated by humans as it originally happened; it sending cyborgs back in time, even if they succeded, would simply create a new timeline where Skynet had a chance to survive.

www.technologyreview.com...

Another similiar article.

Now then, how to scale this up?

edgy.app...

It has been postulated that in order to survive interactions with wormholes, blackholes, whiteholes etc, negative mass must be understood. The phase velocity of light in such systems should be interesting to measure..

Upon reviewing the edgy link, I am reminded of this:

en.wikipedia.org...


scitechdaily.com...

I'd say this sort of material would be instrumental in creating the shielding necessary to contain each "mouth" of the singularity entangled subsystem.

At the very least, it may open the door to Penrose process, Blandford–Znajek process realization.

originally posted by: wildespace

originally posted by: ginseng23
Back to the main idea, the notion of paradox:

io9.gizmodo.com...

I am not exactly sure quite yet, I will have to run some scenarios in my head.

You all bring fascinating points. Please don't be afraid to critique or call out logical fallacies, as this aids in progression.

Interesting article. But it all boils down to the fact (as I see it) that you cannot change your current timeline by going to the past and changing something. If you ever managed to go back and change something, it would be a different timeline. Skynet has been defeated by humans as it originally happened; it sending cyborgs back in time, even if they succeded, would simply create a new timeline where Skynet had a chance to survive.

That definitely could be a possibility, I would imagine there are thresholds of divergence that regulatory bodies strive to uphold, otherwise, it is only one point in spacetime. We happen to observe a particular path. If other paths are to be observed, it may be explained by this experiment:

en.wikipedia.org...

a reply to: datasdream
You're thinking linearly.
You're leaving out multiple timelines / multiverses which quantum theory is actively centered upon.

a reply to: Krakatoa

In short, we are all treading upon quantum foam, blindfolded, and drunk.

So why not just start blowing bubbles, open your third eye and transcend in your choice of state of mind?

As if we thought antimatter was terrifying, harvesting black/white holes for propulsion?

arxiv.org...

lol.

The halo drive. We would have to find material that could actively repulse and withstand the varying energies encountered by Hawking radiation. My head hurts now even worse than before. Page 11 and 12 hold the key on how to dial in your destination in spacetime. It would require the ability to savestate, model, record, and model precise stasis fields that the sort of crystals used in ion traps utilize.

I'm still confused if gravity waves are a result of perturbation, and how could one repulse a perturbation?

originally posted by: wildespace
It would then run its own course, separate from the timeline you came from.

There is really no other timeline than the one you're on. Hypothetical timelines, perhaps. But the thing that makes them hypothetical is you not being in them.

originally posted by: ginseng23
The halo drive. We would have to find material that could actively repulse and withstand the varying energies encountered by Hawking radiation. My head hurts now even worse than before.

Crystallized neutrons held together by 5-D strong force?

a reply to: Blue Shift

a reply to: Blue Shift

Holy sheet dude now I don't know about that..we'll need additional repulsion guarantee lol:

canadianhomesteading.ca...

a reply to: datasdream

Time travel, forward or back, if it were possible, would simply deposit you into an alternate timeline, thus alleviate or nullify the possibility of any paradox that may arise i imagine.

The quantum nature discovered that governs every bit of our universe down to subatomic particles seems to suggest that nothing is fixed, but merely probability waves.

Right now I'm thinking of it (universe) as a huge 'Choose your own adventure' computer program or game, rather than book.

time travel to future and past may become possible soon
a reply to: datasdream