For sake of discussion, lets look at this from the standpoint of a casual movie-goer, so no comics, books, wookiepedia, etc., just the movies and their novelizations. What is it that makes a Jedi a “fully-trained” Jedi Knight? What is it that makes a Sith Lord? What really differentiates a Sith from a Jedi who gives in to the dark side? Is it “kewl powarz” with the Force? Skill with the lightsaber? Length of training? Mental discipline? All of the above? How important is each factor relative to the others? IMO, the movies themselves seem kinda fuzzy on the matter. For example, despite having approximately half the duration of training, Tyranus could use Force lightning while Maul apparently could not. Luke Skywalker’s training was considered dangerously incomplete in ESB, despite displaying abilities that full-blown Council Masters didn’t have in the PT after a lifetime of learning. He then goes back to Dagobah for additional training, and Yoda essentially says “naw…urgood, bro!” Darth Vader spent a quarter century learning from Sidious…to be able to do exactly the same stuff he could do at the end of RotS without any training whatsoever. In a related vein, given the constant warnings in the OT about the dangers of the dark side and the ease with which you can succumb to temptation, what’s the difference between a Jedi who loses their **** (Vader in RotS) and a Dark Lord of the Sith (Vader in the OT)? Discuss.