Back to The Future/Headscratchers: Difference between revisions
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* When 1955 Doc saw his tombstone, how come 1885 Doc didn't remember it?
** Because that Doc never saw the tombstone, in the same way that the Doc from the start of the first film didn't remember meeting Marty in 1955.
*** Actually it's quite possible Doc did remember meeting Marty but was acting like he didn't, the same way he pretended to be shot instead of just avoiding the whole situation with the Libyans... he was preserving the timeline. I think the answer is more something like that when you actually become a time traveler in BttF, it endows you with [[Ripple Effect-Proof Memory]]. Thus Doc would be subject to his memory being changed by time travel interference only up to the point before he travels in time himself, at the end of the first movie. Everyone else who's traveled in time shows that their memories don't change with the timeline. Marty doesn't remember his and his parents' different lives, nor does he remember growing up in Hell Valley. Similarly, Jennifer can still remember what happened in the future of 2015 even though that future now no longer exists (as do Doc and Marty). This is probably an example of [[Required Secondary Superpowers]] to avoid paradox, since it would otherwise be impossible to use time travel to fix any sort of problem... if you fixed it, it didn't happen, thus you wouldn't become aware of needing to fix it, so it wouldn't get fixed, so you would become aware of it, etc.
* So, Doc couldn't repair the time circuits with 1885 components. But he knew how to fix them with 1955 technology; couldn't he build the components he needed? He was able to build a steampunk ice-making machine, would it be that difficult to build 1955 circuits? I don't have knowledge of these things, so probably my question is stupid... but ''why'' is it impossible?
** Because making refrigeration coils is considerably easier than making something to produce a vacuum and thus vacuum tubes, which are clearly a part of the 1955 "microchip"?
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* Was anyone else disappointed that Old West Doc hadn't acquired a new dog back then, and named it Newton?
== Back to the Future: The Game ==
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