"Anakin Skywalker" and "Darth Vader" are both the same person, just as "Palpatine" and "Darth Sidious" are the same and "Count Dooku" and "Darth Tyranus" are the same. "Darth Vader" is a Sith title given to Anakin Skywalker when he turned to the dark side and became a Sith Apprentice. Those are the facts. If you disagree, you're wrong, and you should plain DEAL with it! Anakin Skywalker chose to turn to the Dark Side, before there was any Darth Vader. Think on that for a couple of minutes...