skyjedi2005 said:
Because Vader and Skywalker were separate characters when star wars was made Kenobi had two students, Vader the more powerful of the two killed Skywalker, who was Luke's Father.
Very good point. Maybe making the prequel with an actual Darth Vader does make sense...
Having read that epic article about the creation of Chewbacca and Lucas's other inconsistent statements over the years (as well as midstream revisions), it seems that he truly has an awful memory or just doesn't care to keep things straight in his own mind. I don't think he intends to lie. I do wish he would at least care enough about cinematic history to preserve his original and culturally significant creation.