How to avoid the paradox.

Time travel into the past always raise the discussion about paradox.


Suppose time travel is possible, even to the past.
Here is an idea how to avoid paradox.

A loop shall avoid a paradox.


Original situation:

Day 1: nothing

Day 2:
I loose money by a bad move in shares speculation

Day 3:
I make a time travel to day 1 and
- warn myself about the risk of a possible bad speculation
- leave a message to myself that I MUST MAKE ON DAY 3 A TIME TRAVEL TO DAY 1 TO WARN MYSELF ABOUT A POSSIBLE SPECULATION RISK


The situation after the time travel:

Day 1:
I receive a warning from myself about the risk of a possible bad speculation

Day 2:
I do not make any shares transaction

Day 3:
I make a time travel to day 1 and
- warn myself about the risk of a possible bad speculation
- leave a message to myself that I MUST MAKE ON DAY 3 A TIME TRAVEL TO DAY 1 TO WARN MYSELF ABOUT A POSSIBLE SPECULATION RISK


What do you think about this ?
Is the paradox avoided because no change on days 1 and 3, ( loop respected ) ?

A paradox occured as soon as you make the first change.

Namely:

Day 1: Where you do nothing
and the alternate:
Day 1: Where you receive your message from the future.

If your to look at these paradoxes similar to how a programming language is, then you'll notice that the paradoxal methodology is basially spaghettified looping, where paradox after paradox might occur if you tried to put the timeline the way it was.

In all due respects your method creates a parallel, the method here is that if your crafty enough you ould set some equipment up that could communiate between both parallel timelines.

If you step the timelines then you can make sure that every Day 1: you receive a message and that there are no Day 1's where you do nothing.

(This of course would condense your universe back to a singularity avoiding the paradox)

[Of course with this method, you report when you have a GOOD hand not a bad one, therefore you only hear when you've made a good deal not a bad one.]

I mis-spelled my argumentation

"Is the paradox avoided because no change on days 1 and 3, ( loop respected ) ?"

I should have said

"Is the paradox avoided because no change on days 3, ( loop respected ) ?"

(I applogize)

I think a paradox is avoided because if I tell myself I need to do that timetravel from day 3 to day 1, whatever I do on day 2.

So on day 3, a timetravel happens, even when I have no longer made a bad speculation on day 2.

And there will not be a contradiction.

Am I right ?

It all depends on the theory of time travel you subscribe to. If you believe the "many worlds" theory, you can do whatever you want. Kill you grandpa. Have sex with your grandmother. Invest in stocks. Buy lottery tickets. It's all good.

But if you believe there is only one timeline, you've got trouble.

It seems that if time travel is possible, the many worlds interpretation must be correct. If not, when you go back in time and change things such that you never make the trip back in time can you return? Would there then be two of you? Would you merge somehow with the you from the other timeline? Or would you cease to exist?

but isent there also a theory that the whole time line would just end??? and would you take that risk

but isent there also a theory that the whole time line would just end??? and would you take that risk
I've never heard that one. Why would that happen? Kind of like a computer program crashing, I guess? The assumption there is that the universe could not tolerate a paradox. Given the chaotic nature of existance, I doubt that would be the case.

How to avoid the paradox.

Time travel into the past always raise the discussion about paradox.


Suppose time travel is possible, even to the past.
Here is an idea how to avoid paradox.

A loop shall avoid a paradox.


Original situation:

Day 1: nothing

Day 2:
I loose money by a bad move in shares speculation

Day 3:
I make a time travel to day 1 and
- warn myself about the risk of a possible bad speculation
- leave a message to myself that I MUST MAKE ON DAY 3 A TIME TRAVEL TO DAY 1 TO WARN MYSELF ABOUT A POSSIBLE SPECULATION RISK


The situation after the time travel:

Day 1:
I receive a warning from myself about the risk of a possible bad speculation

Day 2:
I do not make any shares transaction

Day 3:
I make a time travel to day 1 and
- warn myself about the risk of a possible bad speculation
- leave a message to myself that I MUST MAKE ON DAY 3 A TIME TRAVEL TO DAY 1 TO WARN MYSELF ABOUT A POSSIBLE SPECULATION RISK


What do you think about this ?
Is the paradox avoided because no change on days 1 and 3, ( loop respected ) ?

If you warned yourself not to speculate why would you need to leave the message ? You are not going to speculate because you warned yourself so no need to go back in time anymore... :shrug:

Like others said, the many worlds solution seems best.

You'd have destroyed the timeline in which you had made the bad investment decision. After you avoid committing to the lossy shares, you would have no situation in which you needed to time-travel (as Enmos said), thus the alternate timeline is destroyed.

It's harder to make a time paradox than you'd think. Eg, take a look at the season finale of Doctor Who just past, in which future-state humans came to our time to avoid the end of the universe...but began attacking present-state humans. Paradox being, how could future-state humans continue to exist if present-state humans were dying by the thousands? The Tardis was hijacked and modified to hold the paradox in place, keeping the malevolent future-states in our time. Not easy :)

i still think the time line would just end becuase i think the future has been hcoosen and is running in a loop and if you break that loop it canot repair itself.

I just don't see how it is possible do go back in time without the multi-times lines being possible.

Kinda like how we can not see our own star group billion of years ago, yet we can see what is going on with other galaxies billions of years ago.

it says that history and the future have already been chosen and altering that would fuck things up completly destroying a time line

I just don't see how it is possible do go back in time without the multi-times lines being possible.

Kinda like how we can not see our own star group billion of years ago, yet we can see what is going on with other galaxies billions of years ago.

In the case of the opening argument:

1. Timeline merrily going along, T-prime
2. Bad decision made, timeline T1
3. Time travel to T-prime to stop decision T1
4. Bad decision not made T2
5. No longer a reason to time travel T2
6. Timeline with bad decision (T1) never occurs since you time travelled to T-prime to stop it, thus creating T2. Since you never made decision T1, but made decision T2, then timeline T2 exists.

Is that any clearer? I dunno, I kinda see how either theory would be plausible.

In the case of the opening argument:

1. Timeline merrily going along, T-prime
2. Bad decision made, timeline T1
3. Time travel to T-prime to stop decision T1
4. Bad decision not made T2
5. No longer a reason to time travel T2
6. Timeline with bad decision (T1) never occurs since you time travelled to T-prime to stop it, thus creating T2. Since you never made decision T1, but made decision T2, then timeline T2 exists.

Is that any clearer? I dunno, I kinda see how either theory would be plausible.
Some people believe in what's called the "Strong Anthromorphic Principle".

The Strong Anthromorphic Principle suggests that the universe is the way it is, with all the physical constants fine tuned to support life, because time travelers made it that way. People from the distant future are so advanced that they go back in time and create the universe.

This would imply that time travel is inevitable and that paradoxes are no problem as the universe would not exist without it.

Some people believe in what's called the "Strong Anthromorphic Principle".

The Strong Anthromorphic Principle suggests that the universe is the way it is, with all the physical constants fine tuned to support life, because time travelers made it that way. People from the distant future are so advanced that they go back in time and create the universe.

This would imply that time travel is inevitable and that paradoxes are no problem as the universe would not exist without it.

This is somewhat palatable...but it does rule out free will to some extent huh :)

Some people believe in what's called the "Strong Anthromorphic Principle".

The Strong Anthromorphic Principle suggests that the universe is the way it is, with all the physical constants fine tuned to support life, because time travelers made it that way. People from the distant future are so advanced that they go back in time and create the universe.

This would imply that time travel is inevitable and that paradoxes are no problem as the universe would not exist without it.

Was it Issac Asimov that first theorized that? That was the story of the foundation series he wrote in the 50s.
It was robots that did it though - made the universe clear for just humans.

To travel back in time we have a space problem too. If we all travelled back in time 1 day we'd end up dead floating in space.