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Waffles Inc.
Jan 20, 2005

ImpAtom posted:

Movies are movies and don't have the time to dedicate to every single potential loophole or unintended consequence of whatever magical science bullshit they like to discuss.

If a movie has things like this, those things inform the narrative. For instance

ImpAtom posted:

Are the Ghostbusters keeping the spirits of the deceased in their basement without chance of parole and just how horrible a crime is that?

The fact that the Ghostbusters do this heavily informs the narrative and characterizes things. It's not some trivia to be discussed or some fan theory, it's unambiguously what happens in the film

"The ghostbusters extra-judicially imprison ghosts by keeping them locked in a basement and thereby endangering the city of new york" is as basic-level plot explanation as it gets; it's just what happens

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Waffles Inc.
Jan 20, 2005

Shrecknet posted:

BttF is one of the 'big three' of time-travel movie theories/systems (the other two being Terminator and Bill & Ted), and the idea that Marty obliterated his 1985 family by going to 1955 feels absurd. The timestream is ever-adjusting (his photos don't have binary 'marty exists/is annihilated' settings, they fade) and as such, we can infer that what Marty did was simply put his hand in the timestream to divert the water a bit; the fact that there is no Butterfly Effect-style 'Marty went back in time and now Nazi Dinosaurs rule the moon!' is proof enough of this. Since he only adjusted the eddies of the timestream, it's safe to say life proceeded mostly the same, and therefore the family in 1985 is his own.

They’re absolutely different people; they lived different lives

Waffles Inc.
Jan 20, 2005

Shrecknet posted:

Genetically, they are identical. They may have different experiences, but their meat-and-bone composition is identical to what it would have been had Marty not intervened. If we are to assume that any change to one's knowledge or experience completely annihilates your former self, then I am not the same person I was when I started typing this comment.

The trouble with philosophy is, at a certain depth, you just have to assert that reality exists and is real, or else we're just solipsists and nothing matters.

It doesn’t matter what their genetics are. Marty’s end-of-movie family are different people who have radically different experiences, thoughts, personalities and memories from his beginning-of-movie family. He doesn’t know them; they’re strangers to him

Furthermore, he essentially erased the people he did know. Sure by our societal definitions the new people are “better” (in a capitalistic sense) but they are very very different people who to “our” Marty are effectively pod people who look like his family

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