How could Joseph Smith possibly have known about lightsabers? Answer: he could not. Therefore, he must be a true prophet.
don't be decieved, they knew a lot of Physical concepts back then. Perhaps moroni was travelling through time and each time he visited he had come from a different time zone and he just happened to play playing a role in Star Wars at that time and forgot to leave it behind.
This is quite possibly one of the coolest things I've ever read.
"Surely he knows that DCP, The Nehor, Lamanite, and other key apologists..." -Scratch clarifying my status in apologetics "I admit it; I'm a petty, petty man." -Some Schmo