/sci/ - Science & Math

>>10691664
>Saying "it's a paradox that can't be allowed to happen
It's not about "allowing." See:
>>10691614
>Is there "some great universal consciousness intervening in events" that prevents you from traveling faster than the speed of light? Or one that prevents you from phasing through the ground instead of standing on top of it?
Per Novikov self-consistency principle, if you're alive to make the travel to the past at a time before you were born in the first place then you already know nobody prevented you from being born. Whatever you do in the past, you aren't going to prevent your own birth from happening. The universe doesn't have to "magically" intervene and stop you.
It's not like there was ever a past without time traveler you in it and then suddenly you showed up and things that were one way in the past before are now a different way. What traveling to the past means is you were there in the past, as a time traveler, both before you were born and before you ever left for your time travel in the future.
To make this more concrete, imagine the following:
A) You were born in 1986
B) You were given a time machine in 2016 at age 30
C) You used this time machine in 2016 to travel 80 years to the past, to the year 1936
There was only ever one 1936 time period. And you were always in this 1936 time period as a time traveler from the future. Someone took a photograph of you. You were able to see this photograph of yourself at age 30 in the year 1936 when you were age 20 in the year 2006.
"Could" you kill your grandfather in 1936 isn't even the right question as a consequence. The right question is "DID you kill your grandfather in 1936?" And the answer is "no." 1936 already happened long before you were born. If you as a time traveler had killed your grandfather back in 1936 there wouldn't be a chain of events leading to your birth in the first place. It's like asking if a tree can have branches extended downward that block its roots from the ground.

>>10691664
>Saying "it's a paradox that can't be allowed to happen
It's not about "allowing." See:
>>10691614
>Is there "some great universal consciousness intervening in events" that prevents you from traveling faster than the speed of light? Or one that prevents you from phasing through the ground instead of standing on top of it?
Per Novikov self-consistency principle, if you're alive to make the travel to the past at a time before you were born in the first place then you already know nobody prevented you from being born. Whatever you do in the past, you aren't going to prevent your own birth from happening. The universe doesn't have to "magically" intervene and stop you.
It's not like there was ever a past without time traveler you in it and then suddenly you showed up and things that were one way in the past before are now a different way. What traveling to the past means is you were there in the past, as a time traveler, both before you were born and before you ever left for your time travel in the future.
To make this more concrete, imagine the following:
A) You were born in 1986
B) You were given a time machine in 2016 at age 30
C) You used this time machine in 2016 to travel 50 years to the past, to the year 1936
There was only ever one 1936 time period. And you were always in this 1936 time period as a time traveler from the future. Someone took a photograph of you. You were able to see this photograph of yourself at age 30 in the year 1936 when you were age 20 in the year 2006.
"Could" you kill your grandfather in 1936 isn't even the right question as a consequence. The right question is "DID you kill your grandfather in 1936?" And the answer is "no." 1936 already happened long before you were born. If you as a time traveler had killed your grandfather back in 1936 there wouldn't be a chain of events leading to your birth in the first place. It's like asking if a tree can have branches extended downward that block its roots from the ground.

>>7527320
Relativity theory

>>2171501
>>2171554
Given that, can we agree that while the infinite hallway may in fact be the case, our measurement of it will always be finite?