[QUOTE=HumanAbyss;45256364]Personally, I can't believe in free will as long as we have knowledge that the brain is controlled by electricity, and chemicals. That our feelings, thoughts, wants and desires, everything we are is a result of chemical and electric events occurring in the brain according to strict rules of physics and biochemistry.
If free will exists, it has to defy this system. If it can defy this system, then things that change the chemical balance of the brain to change ones emotions(Like effective anti depressants) would never work.[/QUOTE]
I hate this belief. Following it, by definition you'd have to have no life at all to have any free will, because all life is controlled by events occurring, even in computers, so artificial brains would also have the same limitations.
[IMG]http://i.imgur.com/cNFqi.jpg[/IMG]
itt and all threads about science stuff
[QUOTE=ZombieWaffle;45257191]I hate this belief. Following it, by definition you'd have to have no life at all to have any free will, because all life is controlled by events occurring, even in computers, so artificial brains would also have the same limitations.[/QUOTE]
i don't care if you hate it, as far as we can tell it's true
I don't know how you think we exist with free will unless our brains don't operate on those properties.
[QUOTE=ZombieWaffle;45257191]I hate this belief. Following it, by definition you'd have to have no life at all to have any free will, because all life is controlled by events occurring, even in computers, so artificial brains would also have the same limitations.[/QUOTE]
You hating it has no bearing on whether or not it's correct.
[QUOTE=hypno-toad;45254429]Generally being that time travel in the sense of classical mechanics sort of violates causality, but is theoretically possible in a quantum universe model where there are ambiguous and simultaneous branching versions of reality. If the latter is true then going back in time would just cause yet another "branch-off" of that creates it own ambiguous state of reality independent of those that have already been (sort of) established.
Classical mechanics is good for predicting small scale physical interactions in anomaly-free 3d space but it's a shit and overly-simplistic model for explaining just about anything else (like gravity and time dilation) that's what Relativity and Qauntum Mechanics are for.
This is probably a bad explanation since I just sort of regurgitate information telephone-style, but this is the gist of it IIRC. Time travel is technically paradox-free in quantum universe models[/QUOTE]
Why aren't there other ways of making time travel paradox-free? What is a simultaneous branching version of reality?
The discussions going on in this thread have reminded me that, at its most basic level, a physicist is just a large mass of atoms trying to understand itself.
Let's not turn this into a free will debate. It's kind of getting off-topic.
Time Travelling into the past is not possible unless you could somehow re-arrange all atoms in the universe to where they were at that time in the past
As for going into the future... Well, relatively, I suppose you could
[QUOTE=Darkwater124;45254199]Actually it would happen in a different timeline. Time travel (at least back in time) is impossible without entering another timeline, which prevents paradoxes.
I think (mostly guess, haven't really done any research on this) this would also imply you need a second time dimension for time travel.[/QUOTE]
People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint - it's more like a big ball of wibbly wobbly time-y wimey stuff.
[QUOTE=TheTalon;45257862]Time Travelling into the past is not possible unless you could somehow re-arrange all atoms in the universe to where they were at that time in the past[/QUOTE]
Not really. CTCs are perfectly allowed in general relativity at the moment.
[QUOTE=Baron von Hax;45254652]If its possible, how come we haven't seen anyone from the future?[/QUOTE]
because they all went back in time to the titanic to see what happened...and the weight of their time machines sank it
Dunno about you lot but i would abuse the everliving fuck out of time travel.
Maybe thats just a reason why it shouldn't be a thing lol
[QUOTE=nomad1;45255365]Does that mean in the future I can go back to the past to fix every mistake I ever regret?[/QUOTE]
Wouldn't you be killing yourself in a sense? You are who you are now because of your past, and in changing that you would cease to be you, but another version of you with different memories, beliefs, etc. Not even accounting for the butterfly effect.
So who killed JFK
[QUOTE=kevaughan;45258557]So who killed JFK[/QUOTE]
a mass of particles
I bet the world has been saved from destruction many times over the years, but we haven't even realized it. What if a time traveller fucks that up and we all die?
[QUOTE=MightyLOLZOR;45258692]I bet the world has been saved from destruction many times over the years, but we haven't even realized it. What if a time traveller fucks that up and we all die?[/QUOTE]
even if time travel was possible i think it's safe to say that we can throw most of our fictional ideas of time travel out the window
or all of them
If you time traveled to the past wouldn't you be stuck in a loop where you constantly have to travel back in time to the past?
what if time travel is already a thing and history has been edited by a time traveler so we never truly discover it?
here's the full article but don't ask how I got it ;o
[url]https://dl.dropboxusercontent.com/u/25318683/ncomms5145.pdf[/url]
[editline]1st July 2014[/editline]
actually no fuck it it was pretty simple my university library resources give me access to virtually any online journal database so yeah
[QUOTE=JohnnyMo1;45256180]Turns out all realistic models of tachyons don't actually send signals faster than light. It seems at first that a particle with imaginary mass should travel faster than light but analyzing fields with negative mass squared in quantum field theory shows that they don't actually allow faster than light information transfer.
[editline]30th June 2014[/editline]
That's what I've always felt about paradoxes. Basically what happens is when you know the past is the only thing that [I]can[/I] happen. Some event that doesn't change even when you know the outcome (since I don't believe in free will anyway). But I remember reading a paper a while back that I think was by Kip Thorne analyzing the dynamics of particles going through closed timelike curves and even classically their motion is fucked up. I trust Kip Thorne much better than myself. I'll have to go find the paper again, though.
[editline]30th June 2014[/editline]
Echeverria, Klinkhammer, and Thorne, [I]Billiard balls in wormole spacetimes with closed timelike curves: Classical theory[/I]
'When followed assuming no collisions, the trajectory takes the ball through the wormhole and thereby back in time, and then sends the ball into collision with itself. In contrast with one's naive expectation that dangerous trajectories might have multiplicity zero and thereby make the Cauchy problem ill posed ("no solutions"), it is shown that [I]all[/I] dangerous initial trajectories have [I]infinite[/I] multiplicity and thereby make the Cauchy problem ill posed in an unexpected way: "far too many solutions."'
Incidentally according to the abstract, they did a second paper analyzing the quantum case and find that the fucked-upness disappears! Imagine that: this half-remembered paper turned out to be directly relevant to the thread.[/QUOTE]
Picking through things to read on facepunch can get sort of boring, I'm just going to start reading all your previous posts instead. Don't mind me.
I think everything that exists is one, and I am the only reality of it all. You are all just parts to my whole that keep me entertained and active.
Maybe time travel was discovered, and happened until every single person was in their own time line. Thus leading to them being, in theory, the only real thing in that timeline leading it into the future. The attitudes of the people you meet could be the reflection of that beings timeline. The actual person you see is just a faint signal received from the real persons timeline(seeing as how if time travel was once possible, it must still be possible to send and recieve information between timelines), and your dimension pieces this together into the best representation of that persons dimension.
I love thinking about these kind of weird things, even if I'm complete illiterate when trying to explain them.
[QUOTE=find me;45261350]Picking through things to read on facepunch can get sort of boring, I'm just going to start reading all your previous posts instead. Don't mind me.
I think everything that exists is one, and I am the only reality of it all. You are all just parts to my whole that keep me entertained and active.
Maybe time travel was discovered, and happened until every single person was in their own time line. Thus leading to them being, in theory, the only real thing in that timeline leading it into the future. The attitudes of the people you meet could be the reflection of that beings timeline. The actual person you see is just a faint signal received from the real persons timeline(seeing as how if time travel was once possible, it must still be possible to send and recieve information between timelines), and your dimension pieces this together into the best representation of that persons dimension.
I love thinking about these kind of weird things, even if I'm complete illiterate when trying to explain them.[/QUOTE]
There was me thinking that I was the only one who though that.
On topic: If you were to time travel forwards in time and time travel back, wouldn't you arrive in the same past as you set out from?
[QUOTE=find me;45261350]Picking through things to read on facepunch can get sort of boring, I'm just going to start reading all your previous posts instead. Don't mind me.
I think everything that exists is one, and I am the only reality of it all. You are all just parts to my whole that keep me entertained and active.
Maybe time travel was discovered, and happened until every single person was in their own time line. Thus leading to them being, in theory, the only real thing in that timeline leading it into the future. The attitudes of the people you meet could be the reflection of that beings timeline. The actual person you see is just a faint signal received from the real persons timeline(seeing as how if time travel was once possible, it must still be possible to send and recieve information between timelines), and your dimension pieces this together into the best representation of that persons dimension.
I love thinking about these kind of weird things, even if I'm complete illiterate when trying to explain them.[/QUOTE]
Ok, this goes offtopic and philosophical:
I thought about this theory once too.
But..what if we are living in a cross-linked consciousness?
Like, we are one.
E.g.: If I die, my consciousness switches to another person and absorb their memory. Every person we like - we lived that life. Every person we don't like - we didn't live it until now and because of that we don't really understand their motives.
Hope I wrote this understandable.
This takes a lot of fear from dying..
Wow, feels good to get that off my chest. No hippie though.
[QUOTE=Angus725;45254145]But...Causality...[/QUOTE]
Rules are for nerds.
Time travel is for us cool kids.
[QUOTE=find me;45261350]Picking through things to read on facepunch can get sort of boring, I'm just going to start reading all your previous posts instead. Don't mind me.
I think everything that exists is one, and I am the only reality of it all. You are all just parts to my whole that keep me entertained and active.
Maybe time travel was discovered, and happened until every single person was in their own time line. Thus leading to them being, in theory, the only real thing in that timeline leading it into the future. The attitudes of the people you meet could be the reflection of that beings timeline. The actual person you see is just a faint signal received from the real persons timeline(seeing as how if time travel was once possible, it must still be possible to send and recieve information between timelines), and your dimension pieces this together into the best representation of that persons dimension.
I love thinking about these kind of weird things, even if I'm complete illiterate when trying to explain them.[/QUOTE]
Even if time travel worked like this why suddenly do all these people in "your" timeline not become real people? As far as I'm concerned just because you split into a different timeline doesn't mean that the people around you suddenly become subjects of "your" timeline. Even if they didn't exist until after you spawned that universe they should continue to exist after your death.
Maybe we havent seen anyone from the future yet because they can't risk going to any past point before the discovery of time travel technology. If they traveled before it they could end making that tech not develop and thus erase themselves. I like to think that once time travel is invented people from the future will come.
when can personal time travel be a thing where you can only travel back in your own timeline
i don't wanna go back and stop Hitler or save someone, i just wanna go back to when i still had that really tasty sub, maybe save it a little bit longer, or maybe just go back in time again after i'm finished eating it again (and eat it again)
[QUOTE=Mech Bgum;45261819]It rather looks like you have self-esteem issues as you imagine yourself above everyone else. In a very peaceful fashion, but still.[/QUOTE]
Every person is the highest thing in their own timelines, therefore no one is "higher", you didn't understand what I said.
I guess a good example would be to think about your world as being the matrix. Time travel could be the easy link between dimensions. Which could lead a weak dimension into paranoia and anger if experiencing something out of there control(someone from another timeline), and an intelligent one to experience a progression in their timeline.
I hope this isn't derailing but it's pretty much all about time travel, I can be done now though.
There is only one way time is ever going to travel, and that is forwards.
-best snip EU-
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