Future Man is a super cheap looking show but it's moderately funny and there's like a vacuum of good shows to watch right now so...
I really don't like time travel stories because most of them have flaws. Especially the time travelling hot tub kind.
Another time travel idea that I found very entertaining is the one from HPMOR (about time turners): you can never *change* the past, there is no separate past/present/future, reality is just computed in one swoop in a self-consistent way.
E.g. the *first* time you encounter this "past", it's *already* changed. There is no "first run-through" that happens differently where you later decide to go back and change it.
@AshEaria It is one of my favourite ideas. It can also be super creepy because it can create time loops in which you have to go back in time to do something *only because you know you did it*, but the actions are entirely in character with you except that you never *invented* them
@Gargron If you wanna take that one to the next step, how about doing something wild with the expectation of being helped by a "future" self (example jumping out of a window as your future self puts a trampoline under it), because you know that's exactly what you would do and knowing that eventually you'll have to go back in time to help a bro out and save yourself from the fall, as you'd initially planned? Homestuck plays with this quite a bit. TBH Homestuck has every flavor of time travel.
@AshEaria @Gargron Yeah, it's really well-done. The time travel is restricted in certain ways, so there are certain kinds of classic time travel tricks that are just impossible, but it works in a way that makes a lot of sense and happens to be relatively easy to build into a game where players have full agency over their actions at all times
@Gargron Done and done. From the previous conversation I'd pretty much figured out how it was going to go, but a wild read nonetheless. What made it super effective against my nerd type is that it also included gamification, which I am unhealthily interested in.
This is how Time-Turners are supposed to work. This, and not the farce that Cursed Child turned out to be.
I'm more into the Primer-style time travel, where you're stacking up duplicate selves in the same time period
it's a complete violation of the whole "matter cannot be created or destroyed" and all, but optics was once a closed science and discovering lasers opened it again
I honestly think "real" time travel would have such flagrant loopholes in order to preserve other aspects of reality
@Gargron That's my favourite personal take, the 4D 'block universe' of General Relativity plus the 'sum over all possible histories' idea from Quantum Mechanics.
If you want to time travel into the past, you can only do so if by doing so you neither contradict your own observed personal past (Grandfather paradox) nor create information that has no source (bootstrap paradox). At the moment you travel, the universe goes 'wibbly wobbly quantum' and decides if you can or not.
@Gargron This could lead to there being whole organizations of 'Time Monks' owing to the universe simply won't let you time travel unless you do so with pure intentions (ie the intention not to create paradox).
The Time Monks will never kill Baby Hitler because they're trained not to want to, because if they want to, the Time Portal simply won't open for them.
@enkiv2 @Gargron And that's why the Quantum Time Portal will never open for you, but it opens for the Time Monk next to you. And if you stick your hand in it it's just gonna close immediately and you'll lose your hand.
Stupid infinite quantum wossnames of the n-th dimensional Hilbert Spaces.
On the upside: the Cosmic Caretakers are perfectly happy with us abusing the infinite computation power of Time Portals to create super-fast GPUs, so our VR is really slick
but all our Bitcoins are gone.
@Gargron Excellent parallel! See, lightning doesn't follow the shortest path that was divined by the universe, it follows a well understood, local, iterative process to the next lowest-resistance region, then the next, and ends up finding a local minimum (that then turns into plasma and produces a flash).
@Gargron Finding a stable loop is finding a fixed point for the function mapping from "what comes from the future" to "what we send to the past". Not only does that mean the universe can find a solution to any complex problem "instantly", it also means that it can *choose* if there are multiple, and of course I'm ignoring the no-solution case that we call "paradox"