Yes, I see what it is that you can't get past. It appears that you are assuming only one timeline to exercise freewill. But only one timeline allows for only one freewill choice. Perhaps that's the rule for only one timeline. But what if all the other choices one could make also exist on parallel timelines? And I think that is the part you can't get past. Will the person you see today that puts on a red shirt tomorrow morning, be the same person you were with today? What I'm saying is if that person you were with today chose a blue shirt tomorrow morning, and you arrived in a future where he chose a red shirt instead. Then it becomes obvious that your time machine didn't take you to the correct future. But how would you know which future that would be?
Yes, but I would reword it as follows: "But only one timeline allows for only one freewill choice [of other choices offered.]"
. It's as if all those other timelines already exist, just waiting to be chosen.
But the way I have always understood it, the other paths (or timelines as you refer) do not already exist, waiting to be chosen. The choice(s) we make, brings the path into existence, which enables us to travel along it, until we reach anothe fork along the path.
This is the good thing about this site, its making me question my own, long standing viewpoints.
I have never Time Traveled myself, don't know if i would want to.
So there is time and there are timelines. Is there free will ? I don't think so because once you are at a timeline at a time, you see a guy, well he has no free will because he belongs to one timeline so is shirt is blue.
Yes, I think this is where myself and PaulLev have our wires crossed.
My questioning of PaulLev's following assertion, "Travel to the future does avoid the paradoxes, but it's inconsistent with free will" is making the assumption that PaulLev is referring to a single timeline.]"
You slightly misinterpreted your quote from theSaunders paper(s). He termed Everett branches "as corresponding to a new indexical akin to time." In general relativity the three spatial coordinates are indexes "akin to time" thus we have a 3D+1 spacetime continuum. So it's not a straight forward conclusion to assume new "timelines."
It's also a bit of a misnomer to call them "Everett branches." Nowhere in Everett's paper is there any reference to many worlds, alternate universes or anything of a sort. John Wheeler was the PhD advisor as well as a physicist who worked very closely with Bryce DeWitt. Wheeler was more than dismayed with the pop-sci media's jumping on the idea of alternate universes and "many worlds." One should really think of Everett's paper as a very advanced term paper. It was short, did not come close to satisfying his PhD requirement and is very incomplete. It had nothing to do with time travel or alternate universes. In was an attempt to give guidance toward unification of general relativity and quantum mechanics by stating QM in terms of general relativity. But is was not successful in so doing. Over the past half century plus is has continued to fall into disfavor, not because is wasn't a brilliant insight. It was. But it was written 10 years before string theory was proposed and string theory is completely absent from Everett's paper. String theory itself is falling into disfavor becayse after almost 50 years of reseach it has only accomplished proposing an infinite number of possible solutions but not one such solution, so far, is subject to experimental verification - not even in theory. The evidence today points to both theories as being inaccurate descriptions of quantum reality. General Relativity is composed of an infinitely large set of possible solutions but they are all immediately subject to actual, not just theoretical, experimental verification.
Yes, that's exactly right - I'm saying travel to the future is incompatible with free will in a single timeline scenario. That's why I said earlier that the multiple world interpretation would be a way of out of this problem, as it would for paradoxes in time travel to the past.
How is the time-machine scenario any different to me travelling overseas by plane on Tuesday night and arriving at your house on Wednesday morning, to see you wearing whatever coloured shirt you chose to wear? This is the problem I cannot fathom.
The time machine scenario is completely different:
When you travel overseas on Tues night and arrive at my house on Wed morning and see that I am wearing a red shirt, you're seeing what I already did (put on a red shirt).
Yes, that's exactly right - I'm saying travel to the future is incompatible with free will in a single timeline scenario. That's why I said earlier that the multiple world interpretation would be a way of out of this problem, as it would for paradoxes in time travel to the past.
ultimately, its not much difference to say that all possibilities exist at the same time... and that the greater universe is the sum of all possibilities of all things through all time.. which leads to interesting, but inplausable, or paradoxical territory (eg the possibility of all things must include the possibility of nothing being the case)
Back to the topic, I was looking at "monster garage" today and there was a team of women. There was one who said "I don't need to understand to do what I'm told" as she work for the navy. "They give me plans and I just follow them, they ask me to do sonar or things like this"...
Interesting no ? (episode is called Dirt Track Camaro )
ultimately, its not much difference to say that all possibilities exist at the same time... and that the greater universe is the sum of all possibilities of all things through all time.. which leads to interesting, but inplausable, or paradoxical territory (eg the possibility of all things must include the possibility of nothing being the case)