Time travel doesn't exist because time travel wiped out the timelines where it did

[Retros_x]

I thought the simple answer is that time travel backwards isn't really possible. Not just in our timeline, but in general.

 

[GreyLord]

I don't believe that time is actually a thing. Change my mind.

That is like saying Height is not actually a thing.

What we see as height is actually a measurement of something in comparison to something else. The way one does it changes. It may be in Feet. It may be in Meters. It may be in Krogospac, but whatever it is measured in, the idea still exists.

The same applies to time. As I see it, time is a measurement of change. If things were static, I think we would not have any measurement of "time" as one would put it. However, as things change, we measure how quickly or slowly that change occurs.

So, if you believe Change is a thing, then you would believe in the idea that time measures.

What I suppose we mean by time travel is the ability to travel to a former state before certain changes occurred.

We are already traveling through time (though we are traveling forward through time) in that we see progressive changes caused by changes previously.

 

[Umbran]

We still couldn't think of any other post-apocalyptic cyborg movies though lol

Kickpuncher!

 

[Umbran]

I thought the simple answer is that time travel backwards isn't really possible. Not just in our timeline, but in general.

In reality? Quite possibly. But also, proving a negative like, "there is no way to travel backwards in time" is incredibly difficult.

 

[Umbran]

Regarding relativity, I thought the point was that physics / physical reality has no preferred frame of reference. Although, curiously, cosmologically, background radiation seems to provide such a frame.

Not quite.

Einstein's Special Relativity tells us, in effect, that there is no inertial frame of reference in which physical laws of the universe differ. If you are looking at two different frames of reference, and you account for the (constant) velocity difference between them, the laws of the universe will be the same in both.

An "inertial frame" is one in which, in the absence of a net force, a body will follow Newton's Laws. Basically, any frame of reference that is itself not accelerating is likely an inertial frame.

 

[Umbran]

That is like saying Height is not actually a thing.

Well...
Since we are talking about weird things like time travel....
If we are, in fact, a hologram or a simulation (two kinda weird, but technically possible cosmologies), then "height" may, in fact, be an illusion.

 

[Maxperson]

This is basically how every game of Chrononauts ends up playing out

You play with them? I eat my cronuts.

 

[Gradine]