Per said:
Baboon said:
There's a lot we don't know, and it would be retarded to dismiss it as "Time travel is strictly impossible".
About as retarded as dismissing the fact that a purple octopus sits atop your monitor whenever you're not looking. It doesn't mean it deserves any form of consideration or recognition.
I nearly died laughing because of that one.
I think the decision-bound multiverse theory is a huge load of crap. Especially because it simplifies probabilities A LOT. Unless you want to defend your speciecism with religious concepts of humans being the only creatures capable of making decisions, there's no reason only human decisions would create new dimensions.
If that is NOT the case, then why limit it to decisions? Do you choose "decisions" because you think of them as unpredictable?
As far as I know the only reason we can't predict the exact outcome of an event is that measurements don't have a perfect precision (because we can't measure things below a certain minimum without influencing them) and something about quantum science.
My hypothesis (even if it may be on the same scientific level as your squid example) is that time is completely linear and time travel is entirely impossible (for humans) because we only consist of matter and energy.
I wouldn't exclude the possibility that something begins in the "future" and travels "backwards" through time -- we might as well be living through time "backwards", we wouldn't know (relativity really can be a bitch, I suppose Einstein knew that).
Then again, I'm a deterministic physicalist and your concept of conciousness and the whole "soul" thing has a huge impact on what thesis on time travel, alternate universes and so on, you are going to accept or oppose.
I remember having heard something about quantum physics having lead to accepting the idea that the future can not be predicted (not even in a theoretical situation), but I can't remember what the exact reasons were. I can't imagine Hawking stating that something doesn't obey a law of physics, but that would be the only condition for a situation which is unpredictable despite knowing the state of every single "variable" -- then again, that's the only way for there to be such a thing as free will.
Eh. I guess opinions really are like assholes.