Theory to disprove time travel

BJolliff

Temporal Novice
Time travel is impossible. If it were possible then there would have to other dimensions in which our current present is elsewheres past.In which case if time travel ever happened it would have happened in the dimension that is ahead of us in time. And since we believe that travel to the past would be easier then that is what would be tried and proven first and therefore we would already know about time travel being successful. Tell me what you think.
 
If time travel were impossible, would you not be 'stuck in a moment' ?
 
Maybe there are multiple dimensions / parallel universes, who knows.

And isn't it cool to think that maybe there is a single dimension where time travel is possible. Maybe this dimension is reserved (or something) for the one place where timelines are relentlessly altered from constant time traveling. Although I wonder how long it would take for the apocalyptic-consequences-big-fear to occur.
 
DDC,

well, isnt that what LHC of CERN is all about, though???

No. The LHC isn't about time travel. It's about high energy particle physics (HEP) in general. It was built because Congress killed the US Super Collider project about 20 years ago.
 
Just because we don't know if time travel is possible right now doesn' mean its impossible. For example William Gilbert had the idea of electricity in 1600, but it wasn't proved to be real until 1752.
 
if time travel possible => dimensions in which our current present is elsewheres past

if time travel ever happened => happened in the dimension that is ahead of us in time

if travel to the past would be easier => that is what would be tried and proven first

therefore

we would already know about time travel being successful


...because some other time traveller would already have appeared here since we are the past of somewhere else?

how do we know that this hasn't happened? the time traveller could have turned up on a deserted island LOST style. the time traveller could conceal their presence. everyone who knew about the time traveller could have died already, leaving no record.

remember, we can't be chauvinistic as to our own time in history. a traveller might have shown up long, long ago. and disappeared again so completely we will never know.
 
we would already know about time travel being successful

If I've learned one thing so far...

Just because something is possible definately does not mean we are yet aware.
...sure someone might be aware - but even if no one was -
how old is the oldest found battery?
 
we would already know about time travel being successful

I've used that argument several times in the past. When I'd offer the argument, however, I knew that it was somewhat fallacious.

The problem lies in how time travel is accomplished. If time travel is accomplished by opening a closed timelike curve - a timespace that loops back to the past, the standard time travel saga we see here: black holes creating CTC's, e.g. The Titor Method.- then people in the present wouldn't necessarily know about time travel being successful.

When a gadget somehow loops spacetime the loop begins at the instant that the gadget is turned on and extends forward in time as the gadget moves forward in time at the same rate as everything else moves forward in time. The loop gets larger as it extends toward the future but the loop only extends back to the instant that the gadget was turned on. Time travel is accomplished by entering the loop and (hand wave, hand wave) they somehow figure out when and how to exit the closed loop at some predetermined time coordinate. The machine can't be used to travel any farther into the past than that.

People in the future who invent and turn on CTC based time machines in 2036 can't arbitrarily ring up the year 1975, 1998 and 2000. The years prior to 2036 exist in an area of spacetime where neither the loop nor the black hole that creates the loop exist. They can't travel any farther back in time than 2036. And they don't want to ever shut their gadget off. If they shut the gadget off the loop will continue to exist in their past but its boundaries are 2036 to the instant that they turned it off. When they turn the gadget back on they start a new loop but it isn't connected to the original loop. The years between 2036 and when they turned it off are no longer accessible to them.

If time travel is possible it explains why we don't see any time travelers. A time machine hasn't as yet been activated in our time.
 
I just tried to make the original post somewhat syllogistic to understand it. /ttiforum/images/graemlins/smile.gif

The closed loop idea is interesting but I am always suspicious of anything that has that much uniqueness- what if there is an alien race that has already activated a time machine? As of when they did that, could it be like a stable wormhole from science fiction- an open doorway to another time or several times? I thought if there is a wormhole etc.etc. then effectively there aren't different times- it's like an open airlock underwater- the outside and the inside share the same fluid medium- in this case spacetime... ?
 
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